^^ I agree. In my case, I wanted to raise KH to help give the water more buffering capacity and keep the PH stable. The raising of the ph by .3 was a side effect. my KH was at 3 dkh and I got it to 6 dkh.
before that, I was loosing ph. my tap is 7.2ph and my tanks would show 6.0ph. I would do a WC and in a day or so, back to 6.0. This was on my 29. after raising the kh, it's much more stable. ph holds at 7.3.