I've been doing a 10% change weekly, but then I don't have my skimmer in yet. It just arrived on Friday, and I'm going to wait a while before putting it in (my Coral Beauty Angel has only been in the tank for about a week and half...don't want to disrupt things too much). Besides, I just put in a whole snail population today. One thing at a time.
So far though, the water changes have been working great. My test results have all been very stable (so far) at ph 8.4, ammon. 0, nitrites 0, and (finally) nitrates 0. I need to another test this week, probably Friday after work when I do my water change.
Lisa :happyfish