I tried lowering my pH (8.5) with muriatic acid. Got it down to 7.5 from morning to night doing small doses, woke up this morning and its at 8.5 agian. I checked the kh and it was 4°.

I am assumming what ever buffer is in there is earing up the acid. And other suggestions?

I was thinking of distilling water but i dont know of a formula for this.

Thanks in advance!