Coral woes.. Help a newbie.. You once were one!

[kien]

Well, it does look like you are getting some growth on your rocks :-). Although the majority of it still appears pristine. I don't think you necessarily need to take your skimmer off line. Since your nutrient levels are reading zero across the board you could look into feeding your tank more. A pair of clowns and a Chromis is a very very light bio load for a 125g tank. Is your skimmer even pulling anything out?? LOL. Maybe start adding more fish or feed your corals more through other methods.