top up and ph

[mark]

I'm not adding any buffers (other than what's in salt mix) and my pH stays constant between water changes (slight dip after lights go out).

I do though aerate my change water (fr a home ro/di unit) for a day or two before adding salt.

Before I had the direct hookup I was also aerating the topoff water in gallon jugs before adding, now I'm straight from the ro/di unit through a float valve to sump and notice no difference in pH. Still believe though a good idea for larger volumes to aerate first.