I don't mean to hijack the thread, but I have the same problem. pH is always at 7.8 in the main tank, and when I make a fresh batch of saltwater it tests at 7.8 as well after aeration. I'm using ro
/distilled water, and hagen and salifert pH test kits. I am also using a kh
buffer but it doesn't seem to be helping (kh
and calcium levels test normal). I have my powerheads so the water breaks the surface.
Is a pH of 7.8 (even when the lights are on) dangerous for my liverock and fish?
Is there a safe way to raise my pH?