i have same problem with little to no nitrates in my planted betta tank. literally at 0 and all I have is 1 male betta and 2 nerite snails in a 5 gallon. I found my fast growing plants were doing horrible and I had algae everywhere. I got nitrogen liquid fert to increase nitrate load and just started it yesterday. nitrogen is a macro and nitrates are a decent indicator of this, if I understand correctly. the bottle does say that no nitrogen can stunt growth. I'm hoping to see improvement in a week or so but since cleaning my tank of the algae yesterday and adding nitrogen yesterday, little to no algae has returned.
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