I'm kind of sad I didn't know your chanel before, but I think my future will be bright.
@Marenga2012
6 ай бұрын
Very good video. How many is EDTA di sodic solubility in water?
@darknectarcooperative7242
Жыл бұрын
Thanks Daniel, great information again! Sometimes I'm doing these sort of things on my own and then see your video and it really helps build my confidence that I'm doing it right. Especially with micronutrients where it's expensive to test concentration and it's easy to induce a toxicity. I have a question for OMRI growers. I think all the micronutrients are OMRI approved, however the preservatives and chelators are not. I was thinking of making a gallon of this as you instructed, minus the preservative and chelators. Then pour them in quart jars, put in pressure cooker, can it (sterilized and vacuum sealed). Then each quart jar will be for 250 gallons of micronutrients. Any problem with this? Could add humic acid to make to dye the solution black? I don't think we need chelation in an organic system because there's already numerous natural chelators (lactic acid, citric acid, amino acid, humates, etc...) and because we control the pH tightly to 6.0. At pH 6.0, I don't think any nutrients need to be chelated or complexed for uptake (inorganic or organic)...is that correct?
@ScienceinHydroponics
Жыл бұрын
Thanks for commenting. It is important to note that the micronutrient sulfates can be OMRI approved, but only "approved with restrictions" which means that their use is only allowed in organic growing when a deficiency is certified through tissue testing. They are not allowed for general use. When looking at the OMRI certifications it is important to consider whether they are issued with or without these restrictions. In your proposal the main issue will be that the Fe will oxidize very quickly and turn into insoluble oxides/hydroxides, the pH of the solution will need to be buffered and chelating agents will need to be added to prevent this problem. Some chelating agents are OMRI approved - although much weaker than the synthetic ones - like for example citric acid.
@laurentmarc1928
7 ай бұрын
Thx a lot Daniel for this explicative video. I have a doubt about the iron chelate generated in situ with EDTA. It is stable at a pH up to 6 what is fine in your mother solution. But as soon as it is diluted in the nutrient solution you will get precipitation and then no availibility for the roots. Haven't you tried with DTPA (chelate stable up to 6.5) ?
@normantaffefiny8227
6 ай бұрын
Are micronutrients always chelated in the same ratio's / weights?
@shshin2758
3 жыл бұрын
Thank you for the vid! I have a question about using sodium benzoate. You did say in the video that the precise amount isn't too important, but is there a point where it becomes too toxic? Also, I have been adding Sodium Benzoate to the pH buffers as you've shown in your video, but I am wondering now that it wouldn't work for a pH 7 buffer due to its low acidity? In the vid, you only showed us instructions for a pH 4 buffer so I am curious. As always, appreciate the content and your answers! Take care :) PS. I found that I could add dyes and sodium benzoate in the accurate weighing method by combining Daniel's two methods (I had no commercial pH buffers at hand atm): 1. Make an accurate pH 4 / pH 7 solution through the method shown in the scale method. 2. Use those buffers to calibrate my pH meter accurately. 3. Add dyes and sodium benzoate and then add potassium citrate / citric acid to bring it back to the required pH.
@ScienceinHydroponics
3 жыл бұрын
Thanks for writing! Benzoic acid has a pka of 4.20. so it could be used to prepare a buffer with a pH of 4.0 with no problems. However the solubility of benzoic acid in water is quite limited, so the strength of the buffer would be limited to this value, which is around 3g/L. It is not possible to prepare a pH 7 buffer using sodium benzoate. Note that sodium benzoate is also only a good preservative at a pH < 5, so it will not do a great job preserving a pH 7 buffer.
@nileshkhaladkar198
6 ай бұрын
this is chelated micronutrient or not ? as far my knowledge for chelation purpose should be heated reaction to up to 50 to 60 degree Celsius ?
@edigosuprapto
3 жыл бұрын
Thank you for sharing your knowledge. I hope video video about foliar feeding ready.
@ScienceinHydroponics
3 жыл бұрын
Thanks for commenting! There are some videos about this coming up in the near future.
@edigosuprapto
3 жыл бұрын
@@ScienceinHydroponics thank you, looking forward to your video's,
@magicalmirrorphotobooth3707
2 жыл бұрын
Thank you for this video? Is the magnetic stir device mandatory to complete this?
@ScienceinHydroponics
2 жыл бұрын
Thanks for commenting. It is not necessary, just useful! You can stir this with a glass rod, wooden spoon or a plastic spoon if you wish. Don't use a metallic spoon though.
@johnthor7693
3 жыл бұрын
need your advice, on creating 1:4000 micronutrient concentrate that consists only anorganic using copper sulfate + sodium molybdate + zinc sulfate + manganese sulfate, Boric Acid is skipped due to solubility issue while Fe is skipped to avoid any organic chelate usage ? The goal is, minimize error by increasing the amount weighted and prolong the life by not using any organic. Anyway, thanks for your priceless sharing
@ScienceinHydroponics
3 жыл бұрын
Thanks for commenting John. If you want my help creating a concentrate, please feel free to book an hour of consulting through my website (scienceinhydroponics.com/book-now).
@hanumkas
2 жыл бұрын
I watched the A & B solution video too of yours. Now I'm confused because their were Micronutrients in Solution B as well. Do I need to prepare this Micro solution ? Will be waiting for your reply.
@ScienceinHydroponics
2 жыл бұрын
This solution is only when you want to prepare more highly concentrated micronutrients and then prepare a B without micronutrients. It is useful if you want to change your macronutrient ratios but keep your micros constant.
@hanumkas
2 жыл бұрын
@@ScienceinHydroponics Thanks for the reply Daniel.
@totopolo2379
Жыл бұрын
colombian author has one extra video about solution A B C ypu can make it work that way, it has advantages such as only adds B to replenish to a point.
@stevengayler8447
3 жыл бұрын
Thank you so much for these videos!
@ScienceinHydroponics
3 жыл бұрын
Glad you like them!
@JMR2414
Жыл бұрын
Hi Daniel, if I want to make a concentrate from magnesium sulfate and disodium EDTA... how much disodium I have to use? and vinager? the concentration is 1:400 100g of MgSO₄ 7H₂O per litre of water. Thanks a lot for you content!
@ScienceinHydroponics
Жыл бұрын
Thanks for commenting. That would require some time to make the appropriate calculations. If you're interested in getting an answer to your question, please consider booking an hour of consulting through my website (scienceinhydroponics.com/book)
@nestyplus
Жыл бұрын
Hello Dr. Fernandez, I hope you find time to read this message... Can I replace it with Tetrasodium EDTA using the same amount of Disodium EDTA? Reason being is there's only tetrasodium EDTA in my location. thanks.
@ScienceinHydroponics
Жыл бұрын
You can replace it, but you will need to change the amount in proportion to the difference in molar mass between both substances.
@US-vy8up
2 жыл бұрын
Thank u sir! My greatest pleasure lately is to watch and apply your videos but ı have to ask is there anything you can recommend instead of sodium benzoate?
@ScienceinHydroponics
2 жыл бұрын
Thanks for writing! There are several groups of preservatives that can be used, depending on the pH of the target solution and its contents. Potassium sorbate is another popular, yet more expensive choice, for solutions like the one shown in this video.
@US-vy8up
2 жыл бұрын
@@ScienceinHydroponics Thank u, thank u very much.
@twistedpistil5718
2 жыл бұрын
I am wondering your thoughts on the best way to chelate micronutrients. I've heard plenty of bad things about EDTA. Is Iron Sulfate, Iron Nitrate, or Iron EDTA or Iron DTPA better? Thank you for your contributions to the community!
@twistedpistil5718
2 жыл бұрын
Also wondering which chelated micros fall out of solution in UV filtration systems. I think it was Iron EDTA, but I can't find the video. I think Cari Peter's was talking about it in a Webinar. I could be way off here.
@ScienceinHydroponics
2 жыл бұрын
Thanks for commenting! The question can be quite extensive (video about this in the future). However, here are some pointers: Most negative comments about EDTA come from the fact that it requires much better management of the crop to be used successfully. If you don't know the necessary conditions to use EDTA correctly, you're likely going to have issues with it. If your crop pH is managed adequately (the pH never deviates from 5.8-6.2 in the media -- the media, not the feed) and the media is inert and has no amendments, then EDTA is a good chelate choice. If your media pH can deviate substantially or you don't monitor it rigorously, then use DTPA iron. Many people think EDDHA is better, it's really not (info in the future video). DTPA is the most "fool proof" choice of chelating agent for Fe. Also, make sure if you use FeEDTA that you also chelate all other micros. If you chelate only the Fe, then you will have lots of problems if your chelate is EDTA (more on this on a future video). About UV and chelates. Ultra violet light can destroy ANY of the organic chelates, as they are not stable against this sort of radiation. Whether this means the metal also falls out of solution depends on the pH and ORP conditions of the solution. There are several solutions, one is adding a "chelating agent reserve" from the start so that it can rechelate any metals whose chelates are destroyed. Another is to replenish the chelated metal. Controlling exposure time and UV power is also important. Facilities that suffer from bad chelate destruction issues often have long exposure times or unnecessarily strong UV lights. I hope the above is helfpul!
@twistedpistil5718
2 жыл бұрын
Very helpful. Can't wait for the video. I love your material. Keep it up, and thank you so much!
@lucianospinelli5127
2 жыл бұрын
Hello my name is Luciano from Argentina , i was interested in hydroponic an years ago an start my idea of making my own nutrients (rare in my country) first i started reading an old user of a forum called Fatman , but it was a little hard to understand with my poor chemistry knoweldge, but your channel givesme another chance to make it (you explain very well ). Thanks for your videos , i going to try to sell my nutrients to exit the bad economy of my family. I wish you a lot of subs and views in your video. And i dont know if you speak spanish but i need to say something. Sos un genio!!! Thankss for all
@ScienceinHydroponics
2 жыл бұрын
Muchas gracias por tu comentario!
@darknectarcooperative7242
Жыл бұрын
When I mixed the sulfate solution with Sodium Molybdate, there was a precipitate. What is the precipitate and will it re-dissolve in the reservoir?
@ScienceinHydroponics
Жыл бұрын
There should have been no precipitate. I would suggest checking the amount of salts added and making sure the purity of your salts is adequate.
@feyknsfeykns5653
11 ай бұрын
had the same... a clear crystalline precipitate. not water soluble at tbe first sight... but i put the precipitate in fresh water and added some more metall sulfates and the most of it disolved... could it be that the excces of EDTA recristallizes?
@danianbez6394
7 ай бұрын
Why cant the same be done with macro nutrients. I also want to create A&B concentrated solution that is 1000x. So you only have to use approximately 3ml of each per litre ? Would this be possible
@GeneoftheWorld
10 ай бұрын
thats neat. now, what i haven't heard is any safety precautions, what if final concentrate glass breaks and spills? you got a heavy metal mess, bad for anything life it comes into contact with. also, the concentrates themselves, if im going thru this much trouble to measure everything just right, may do this in windless day outdoors with mask on, not in my kitchen. LOL.
@ScienceinHydroponics
9 ай бұрын
Thanks for sharing. Yes, a 1000x concentrate is a mess if it breaks. You can prepare a saturated solution of sodium phosphate to keep handy. If you have a spill using that will precipitate all the metals as insoluble metal phosphates. So all living things will be safe from the spill!
@DarkChild1758
Жыл бұрын
Can i use the finished product in soil
@ScienceinHydroponics
Жыл бұрын
Yes, you can, after properly diluting it to final concentration.
@feyknsfeykns5653
Жыл бұрын
should I also chelate the Magnesiun Sulfate in my B solution to prevent Calcium sulfate precipitation in my end solution?
@ScienceinHydroponics
Жыл бұрын
No, this is not necessary. The final solution should contain Ca and S at concentrations low enough to prevent precipitation. Adding that much EDTA or other chelating agent would also have negative effects on the plants.
@feyknsfeykns5653
Жыл бұрын
then I still have no clue why my final solution isn't stable for more than 2 days. N240-209-K260-Mg60-Ca260-S90 100x conentrated with micros as pH+ KOH or KSil (pH6.3...Im in soil). P too high for feed??.. any Idea? Concentrates and chelating works great with your method... really big thanks for you efforts... i already learned a lot
@googlesucks3520
10 ай бұрын
I have a spin off question here. If i have a premade powered micronutrient mix that i am happy with in terms of ratios they use, but this mix is made from all sulfates with no mention of any chelates used, can i make a stock solution of these micros and then add DTPA first to chelate the iron and then EDTA to chelate the remaining micros?
@ScienceinHydroponics
9 ай бұрын
Yes, but you can add both chelating agents at the same time. Chelates formed will reach equilibrium within a couple of days, regardless of the order in which you add them. The DTPA will end up all binding the Fe and the EDTA the other metals. Just because of their differences in affinity.
@chibamann6507
Жыл бұрын
Hey Daniel, I heard you say not to use phosphoric acid. I was thinking of making a diy ph down using phosphoric acid for my hydro system, Would you recommend not using it & if so is there an alternative option? 👍🏾💚👊🏾
@ScienceinHydroponics
Жыл бұрын
I do not recommend using it as phosphorous is a nutrient you want to control exactly. Sulfuric acid is normally the best choice as plants are much less sensitive to absolute sulfate concentrations.
@chibamann6507
Жыл бұрын
@@ScienceinHydroponics OK I got it, sulfuric acid (battery acid) instead of phosphoric. Would I dilute it with water only or should I add something like iron or whatever? Also in what amounts should I mix the mixture? Thanks alot, now I gotta cancel my phosphoric acid order😁👍🏾💚👊🏾🙏🏿
@didYou553
2 жыл бұрын
I have a question, what if I use a generic micro nutrient, for example all micro nutrient are are available in generic micro nutrient. How much or grams i add per liter of the water? Thank you
@ScienceinHydroponics
2 жыл бұрын
Thanks for commenting. I sadly cannot answer your question, it depends on the micronutrient product you are using.
@stefano5080
3 жыл бұрын
Could we also use a pycnometer to measure the concentrated solution in grams?
@ScienceinHydroponics
3 жыл бұрын
Thanks for commenting! Yes, if you figure out the density using a pycnometer you will be able to do additions in grams. This would be more accurate indeed.
@intelimd6439
Жыл бұрын
Hi Daniel, please tell let me know many grams of Ferrous Sulfate Heptahydrate is needed in your formulation instead of Iron sulfate (anhydrous). You could also give me a formula to calculate. I am new at this :)
@ScienceinHydroponics
Жыл бұрын
If you are using the heptahydrate, multiply the mass of anhydrous Fe sulfate by 1.35.
@budianto-1650
5 ай бұрын
@@ScienceinHydroponics Fe in Anhydrous is 36.7%, while Fe in hepta is 20% , the multiply factor is 1.35 or 1.83 (36.7%/20%) ?
@atulagarwal5514
Жыл бұрын
What should be the dosage of sodium benzoate in a solution? As per ppm or milligrams per litre? Plz guide in this issue????
@ScienceinHydroponics
Жыл бұрын
Normally 0.1-0.4g/L would be adequate.
@atulagarwal5514
Жыл бұрын
@@ScienceinHydroponics 0.4 gms per litre of stock solution???
@skybound1708
3 жыл бұрын
How can you tell if the iron oxidizes and turns to rust? I once tried making micro concentrates with sulfates and no added chelators, and it turned into rust water in 2 days, but if I mixed in food coloring, I'd never know. Is the chelating agent really that effective that you don't have to worry about oxidization?
@ScienceinHydroponics
3 жыл бұрын
Hi Sky, thanks for commenting! You can make it without dye and monitor it, you won't see any oxide precipitate (I have done this to confirm). The iron will always oxidize to Fe3+, but the EDTA very strongly chelates Fe3+ and prevents any precipitate from forming.
@skybound1708
3 жыл бұрын
@@ScienceinHydroponics would the same reaction occur if Amino Acid was used as the chelating agent, or does that not have the chemical attraction that the EDTA does?
@edigosuprapto
3 жыл бұрын
How about adding some fulfic acid?
@ScienceinHydroponics
3 жыл бұрын
Thanks for your reply! Aminoacid chelates are much weaker (millons of times weaker), but they might work well enough if the right amino acids are used.
@ScienceinHydroponics
3 жыл бұрын
Thanks for commenting! Fulvic acid is likely not a good enough chelating agent to keep these micros in solution at these high concentrations.
@ayahhebat4388
3 жыл бұрын
Would you teach us on how to calculate amount of required EDTA ? I'll try to figure out how to decide amount of disodium EDTA on your solution, total metal (copper + iron + zinc + manganese) is 0,0171 mol, but my calculation for 7.2 gram disodium EDTA is 0,0193 mol. Shouldn't the amount of mol be the same ?
@ScienceinHydroponics
3 жыл бұрын
Thanks for commenting! I always add a 10-20% molar excess of chelating agent, to ensure everything is chelated and I am not left with any unchelated transition metal. This also accounts for any impurities in the EDTA.
@paulbraga4460
2 жыл бұрын
2 things if you please - can we use something else instead of EDTA. also a science question? can you explain the difference between a substance is in the "reduced" form versus "oxidized"? like - is the iron sulfate in the reduced form? mygreathanks and blessings
@ScienceinHydroponics
2 жыл бұрын
Thanks for commenting. You can use any metal chelates that have high stability, this includes DTPA, EDDHA chelates and others that are less well known. However weak chelates, like amino acids, are not going to work well. About the oxidized/reduced forms, it depends on the substances. In the case of iron, it commonly is either metallic iron (most reduced form), iron II or iron III. The higher the charge of the iron, the more oxidized it is. Iron (II) sulfate will be a more reduced form compared to iron (III) sulfate.
@paulbraga4460
2 жыл бұрын
@@ScienceinHydroponics o my goodness sir. that was fast. and i didn't even expect an answer, to be totally frank about it. About the reduced form, there is this assertion about iron needing to be in the reduced form else, it will enter the plant and not be functional, per plant sap analysis by a Netherlands company. and continuing with total frankness, i am not into hydroponics but your videos are totally open, educational, and helpful to diy people and what i am trying to develop is foliar sprays of iron and manganese - the 2 most problematic in growing in soils. about the chelation, would fulvic chelation work...mygreathanks and blessings from the Philippines🙏
@darknectarcooperative7242
Жыл бұрын
@@paulbraga4460 to make the iron and manganese available on a foliar, you can 1) reduce the oxidation and/or 2)lower the pH. (these aren't independent though). I simply put appropriate amount manganese sulfate and/or iron sulfate in 1 gallon RO water + 1 tablespoon 5% vinegar + 1/8 teaspoon humic acid + 1/8 teaspoon fulvic acid. You're good to go. If you have access to omri agrothrive 3-3-2 or 3-3-5, you can instead: use appropriate amount manganese sulfate and/or iron sulfate in 1 gallon RO water + 1 tablespoon agrothrive. The agrothrive is a lactic ferment complete organic fertilizer. It contains lactic acid, amino acid and humates that will all help to both reduce and chelate the foliar.
@paulbraga4460
Жыл бұрын
@@darknectarcooperative7242 wonderful. many many many thanks really...i should pick your mind ...blessings
@darknectarcooperative7242
Жыл бұрын
@@paulbraga4460 You're welcome. You asked in email what is appropriate.... I'm not sure what is appropriate, depends on the plant and how bad the deficiency is. A lot of plants probably have a sap level of Iron 5ppm and Manganese 4ppm. That's probably a good starting point...spray the same concentration as the target sap level. Then I would try 10x that level on a few plants and see if the results are better or worse. (I suspect 10x the sap level is best, but better be safe than sorry) Here's an estimate:So 1 gallon is about 4L = 4kg of RO water. Ferrous Sulfate Heptahydrate(FSH) is 12% Iron. Manganese Sulfate Monohydrate(MSM) is 19% Manganese a little algebra: 5ppm = 5g/1,000,000g = .12*(FSH)/4,000g FSH=.17g 4ppm = 4g/1,000,000g = .19*(MSM)/4,000g MSM= .08g So I would trial A) 4L of RO water + .17g of FSH + .08g of MSM, and B) 4L of RO water + 1.7g of FSH + .8g of MSM somebody check my math, I did this quickly. If you DIY lactic ferment... It's difficult to predict how strong your fermented compost will be. so, add enough fermented compost to water so that the TDS is about 500ppm. Lactic ferments can be as low as pH 3.5. I think it's always safe to spray with pH 5.0. So once you get your solution to 500ppm, check the pH. If it's below 5.0, add a pinch of sodium bicarbonate or potassium bicarbonate(use if your plants already have too much sodium).Add bicarbonates until the pH is 5.0.
@souravpal4636
Жыл бұрын
The Zinc concentration in the final solution is around 0.5 ppm is that ok for cocopeat media?? I've seen some toxic effects with similar concentration.
@ScienceinHydroponics
Жыл бұрын
This will be ok in cocopeat media.
@Andrew-bh2du
3 жыл бұрын
Hello Daniel, Thanks for the video. I have a question about using your formulation with hydrobuddy. Since we know the final volume, and ppm of the heavy metals, would it be reasonable to solve for EDTA in terms of ppm, where the final ppm for the EDTA molecule is approximately equal to 1.25 x the sum of ppm of metallic elements as per hydrobuddy? To do this I added disodium EDTA to the database as 12.5% Na and 87.5% Cl. In this case Cl was substituted for EDTA since Cl is not used in the formulation. The reason I'm asking is that I would leave iron sulfate out of the solution and substitute iron DTPA, hoping to chelate only the other metals with the EDTA. Thanks
@ScienceinHydroponics
3 жыл бұрын
Hi Andrew. Thanks for commenting! You will want to click the "mM" button in HydroBuddy so that your targets are displayed in mM instead of ppm, add all the amounts you have for the micro nutrients you want to chelate, then multiply that amount by 336.21 (molar mass of Na2H2EDTA) then multiply that by 1.25 (to have a 25% excess). This will give you the target amount of Na2H2EDTA to add in mg. Let me know if this helps!
@Andrew-bh2du
3 жыл бұрын
@@ScienceinHydroponics Yes, thank you. I thought about using mM but wasn't sure how to equate the results to get the desired EDTA. Your suggestion makes sense; however, according to this: "pubchem.ncbi.nlm.nih.gov/compound/6049" the molar mass of EDTA appears to be 292.24, and 338.22 for Na2EDTA. If I run the formulation in your video using the above weights for the Cu, Fe, Mn and Zn compounds as a direct addition to a .25 l vol. I get a total of .049 M of metals. Multiplying this by 292.24 results in 14.32 g EDTA. Given that your calculation of 7.2 g for Na2EDTA is approximately half the amount calculated by hydrobuddy, I'm wondering if my methodology was correct. I double checked the weights and compounds used and get the same results. Also, since Na2EDTA is used instead of EDTA would it be proper to multiply the result for EDTA by 338.00/292.24 to get the weight for Na2EDTA. Thanks
@ScienceinHydroponics
3 жыл бұрын
Thanks for your reply. I will now try to explain the calculations step by step. These are the mM concentrations for the different nutrients in the final solution: Fe - 2.4ppm - 4.298E-02 mM Mn - 1.0ppm - 1.820E-02mM Zn - 0.5ppm - 7.644E-03mM Cu - 0.1ppm - 1.574E-03mM The total amount is 7.02E-02mM if the concentration is 1000x in the concentrated solution, then that would be 70.4mM, multiply by 1.2, that would be 84.48mM. For NaH2EDTA - molar mass of 336.21g/mol - that would give you 28.40g/L. Multiply by 0.25L, you get 7.1g. If you cannot get the same ppm of heavy metals in the final solution for the compounds, then it might be that you're using the wrong compound composition. Make sure you're using the same exact salts with the exact same degrees of hydration. Note several of these are not included in the default DB of hydrobuddy (for example anhydrous iron sulfate). I hope this answers your question!
@twistedpistil5718
2 жыл бұрын
Awesome
@ScienceinHydroponics
2 жыл бұрын
Thanks for your support!
@francescopaparella4887
3 жыл бұрын
Thanks for making videos on how to make nutrients from raw chemicals. However, I'm wondering: just as soil gardeners have the option of composting clippings, dead plants, scrap paper and kitchen residuals, and thus recycle into nutrients these things that would otherwise go waste, is there a way, accessible to the hobbyist, to do the same in hydroponics?
@ScienceinHydroponics
3 жыл бұрын
Thanks for your comment. Yes, this can certainly be done, but some level of lab testing of the resulting solutions is needed. Since we precisely control the nutrition in hydroponics - we don't have help from the buffering systems present in soil, both biological and chemical - we need to make sure we provide the nutrients in the needed amounts.
@francescopaparella4887
3 жыл бұрын
@@ScienceinHydroponics Any chance to see a video on this subject?
@heavencloserheaven3421
2 жыл бұрын
hi :) ,i found in my country micro mix. in (EDTA) powder form -in these concentration: 6%МgO+3%Zn+3%Mn+2.5%B+2.2%Fe+0.3%Cu+0.6%Mo ,how many grams i must ad to the solution?
@ScienceinHydroponics
2 жыл бұрын
Thanks for commenting! Your questions requires a substantial amount of time to answer, I would be happy to answer it through consulting time. You can book an hour of consulting through my website (scienceinhydroponics.com/book).
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