I can not seem to get my nitrates down. My ammonia is 0ppm and my nitrite is 0ppm But my nitrates won't go down any lower than 20ppm which I know isn't terrible but I want them lower. I have aeration going from my power head and cheato algae in my HOB filter. No filter cartridge so its not leaching back into the tank from there. Idk what else to do any suggestions?




