First 10 gallon planted tank!

[newmag1659]

In that case, as long as you keep fish which are suitable for your GH, the pH is fine at 6.0. Adding stuff to raise the pH is not good for the fish since it keeps dropping again, and fluctuating pH is not good for fish. We have several members with a tank pH lower than your and their fish are fine without trying to alter it. Cories will be fine at 6.0 and if the killifish are Fundulopanchax gardneri, they'll be fine as well.

Oh ok! The killifish will be gardneri, yes, so I’ll just leave the pH alone.

 

[Retired Viking]

Having a stable PH is important, it is dangerous for your fish to have your PH jumping all over the place. Yes I would leave it alone.