In order to reduce the nitrite concentration in the fish tank, the sand and gravel filters, which are physical filtration tanks, were drastically cleaned. In addition, based on the last year's operation, I added a function to drain water from the bottom of the tank, added a dispersion hole in the water supply pipe, and readjusted the level of the container. As a result, the air supplied by the blower now distributes more evenly when cleaning the filter. I expect that the nitrite concentration in the water will be lowered.
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NISHIKIGOI CLEANING OF SAND & GRAVEL FILTER SYSTEM [JAPANESE KOI KEEPER]
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