Colombo Nitrate Test Kit (NO3), is produced from the breakdown of nitrite in the filter.
Nitrate is relatively harmless to fish, but its presence can indicate a deterioration in the aquarium environment, and high nitrate will encourage algal growth.
The only way to know what the nitrate level is, is by testing it with a Nitrate test kit.
Colombo Nitrate Test Kit contains 40 tests.
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