All of a sudden micro bubbles?

[wfo115]

I have had my 75 gal with sump/refuguim and aqua-c120 skimmer up and running for about 5 Months. Last week I got a a urchin,starfish and 3 emarld crabs. Two days after I got these the urchin died. At that same time my skimmer was foaming excessive and now I cant get rid of microbubbles that i never had before. I have cleaned the sump and skimmer and built in overflow(all-glass reef ready) and the bubbles went away for about a day. What could be causing these microbubbles? It is not the sump pump because the microbubbles already are starting in the skimmer area of the sump and the skimmer area is also the overflow chamber. Hope this makes sense and I hope some one can help me out. Also I am using the same food as I always do. Thank You

 

[zshain012]

I just read another thread about micro bubbles about a month ago and I think they had the power head to close to the surface of the water or something lol. hope this helps a little

 

[wfo115]

Thanks for the idea, I wish it was that simple, but the powerheads are well below the surface thanks anyways.