Okay so I'm new to the fish keeping hobby. I have a 29 gallon, a 10 gallon & 5 gallon... go big or go home right? I've had the same problem with all of my tanks. Very high Nitrite and nothing I do seems to fix the problem.
PH - 7.5
Amm - 0.25
Nitrite - 5.0ppm
Nitrate - 20ppm
Heaters in both & I...