I have the Coralife superskimmer 65g HOB and it seems to be working alright and it's pretty quiet which I like. Picked it up new for $90 shipped from ebay. It did take awhile to find the sweet spot for it to work properly, about a week. You just have to keep adjusting and adjusting and adjusting and adjusting and adjusting and adjusting
. I mean you don't wan't to come home and have poo water all over your floor
lol so make sure you have time to watch it till you get it were you want it.