gwwebber, it's the Percula 90 I got from you, so 60+ gallons. I put a Tunze 9006 in there, I was getting occasional skim depending on the water level of the tank(it was hanging at an angle then) so I removed a shelf in the overflow so it can hang straight. Right now I'm getting a bunch of bubbles in the bottom of the neck to the collection cup, but they're not making it up there(it was cleaned last night).
No signs of scratching for the fish.
I did a 20% water change on Monday, and also swapped out an old powerhead for another maxijet. Also added a mushroom on monday, that was dipped in revive for 15 minutes before being put in the tank.
The Angel and Tang have both been in there for a little over 2 weeks. His behavior has changed from grazing on all the algae on the rocks to hiding in a cave and swimming around not quite franticly.