Tapwater and kH
Is it normal for kH to fluctuate in tapwater? When I first set up my tank, I tested kH and pH almost daily to read the co2 charts. My tapwater and tank water were always at a kH of 4 so I eventually stopped testing kH.
I've been doing large water changes daily to deal with the eco-complete phosphate issue. Yesterday, I tested my kH and it was 2 in both my tank and in my tapwater. I was very surprised to find this. Is this normal?