I had a aqua c urchin in my sump. It is a good skimmer a lil difficult to get the cup set in the right spot at first. Does a good job of skimming.
I am skimmerless now. But I would recommend it.
no its not loud at all. I dont have it running now because the ph that was running it broke down. The tank has been skimmerless for about 6 months now and didnt see any difference with or w/o skimmer. So I just never bothered to get a new pump.