Who Gives A Fish Forums

Thanks for the tips, everyone. I'll try adding some fast growers and see if that helps. Appreciate the advice!

I've heard mixed opinions on whether plants actually lower nitrates in a tank. My 20 gallon has Java Fern and Anubias, but nitrates still hover around 20 ppm. Am I doing something wrong, or is this just how it works?

I agree with checking the diet. Maybe try some live food like brine shrimp. My guppies love that stuff. Also, how often do you clean the filter? A dirty filter can mess with the water quality even if the params look good.