as far as I know my pH was pretty close to neutral. Yesterday I added rocks to 4 of my tanks. In 3 of them the pH is now 6.0. I tested the tap water and it was pretty close to 7. Anybody know anything and what I should do
You could try some crushed coral. That stuff usually and rapidly will bump your ph up sir. But do be very careful as to the sensitivity of sudden and drastic ph swings...it can cause physiological havoc upon your fish!