So I have had my 25 gallon lagoon going for about 10 months now. It’s had its ups and downs but it is on a very long down right now. My nitrates have always been low ever since I set the tank up. Most of the time this is not a problem but I dance a very fine line between too low and just enough. My question is how can I raise and keep my nitrates raised so my tank doesn’t have diatoms all over it?