I have a 46g bow tank, there's 11 cardinal tetras, 5 sterba cory, 3 otto, 3 guppies and a breeder net with 18 two week old guppy fry. As for plants I have some java moss, amazon sword, cardamine lyrata, and sunset hygrophilia. I'm using an API test kit, when I test my 10g I have nitrates showing...