Leathers, zoas and sps, oh my... (who does it?)

[Whatigot]

In all honesty, my PE was fantastic before I had my clown gobies (x2) and they obviously nip at the polyps, I see it all the time.

before them, I was running a euro reef rs80 and I've bumped up to a Schuran jetskim 120 since then so my skimming has only gotten better and the only fish I have added since are a yellow assessor and 3 zebra dartfish.

I feed my tank 3 times a week, so nutrients are not the issue for me I don't believe, though cannot be 100% until I get rid of the clowns...