
We ought to be addressing the ich before discussing the skimmer. You need to be IMMEDIATELY feeding with garlic soaked food. There is a frozen product that already has garlic so you don't have to try to do your own, or you can find the answers regarding garlic by searching here.
Just last week, my friends Blue Tang had ich and we immediately began feeding Adams concoction from the November meeting. The ich cleared in two days.
Other enemies of ich are the Cleaner Wrasse and the Cleaner Shrimp. The Wrasse is less than half the cost of the Shrimp but lives less than a fourth as long.
I agree with the two experts above, regarding the skimmer.
And you don't have to wait, just lower the skimmer until the top of the clear white bubbles are about two inches from where they overflow. if there is a need for the skimmer, the bubbles will eventually darken and reach the top where they will overflow a dark smelly liquid.
Be patient, It could be producing tomorrow or might take a few days. Tomorrow, if there is overflow (skimate) but it's not dark, raise the skimmer about an inch or until the clear white bubbles are 1-2" below the top of the overflow.
What type of airstone are you using?
And thanks for the pics, that totally helped.
Edited by Mark Peterson