I have a 30 gallon fish tank, My last test numbers were way wrong:
Nitrate 20-40
Nitrite 3.0
Hardness 300+
Alkalinity 300+
PH 8.4
I took out 20 gallons and replaced it with water i bought and tested before hand. It was ) all the way across the board with a PH of 6.2
But now i test my water after the change and non of the levels changed the water is still pretty bad?? what went wrong here? I am about to dismantle the whole setup and clean it again? I dunno