High GH, KH and Low pH?
After some past discussions, I decided to mix my water 25tap/75RO. I was surprised when I tested to find 8 KH and 12 GH in my tank. I do remember, however, that the pure tap was off the meter for KH, GH and pH. Or should I say, it was at the highest range for the test kits. Yes, my tap is well water. Anyway, the really curious thing is that my pH was 6.6. I have not calibrated, is that the cause or is it possible to have this pH with the KH and GH that I have?
Should I do a 10/90 mix?
A large water change is a pain because I have a 125g and my RO only makes about 25g a day. Plus, my rubbermaid is only 30g. So if I want to keep my filter running in the tank, then I can only do a 1/3 water change per day.