I have the #3 and #4 in my tank a few months now and have had no problems. I haven't even had to clean them. I do wish that I had got 2 #4's though. Even when the electric goes out or flickers they start back up with no problem. What a differnce they made in my tank. _________  90g plumbed to basement,75g sump with 10g refugium inside,250 Aqualine skimmer,QuietOne 6000 for return,HydorKoralia's #3 #4,2 kind zoanthus,3 kind mushrooms,pulsing xenia,yellow polyps,Sailfin Tang,coral beauty,sixline wrass,lawnmower blenny,Kole Tang,royal gramma,firefish,snails,hermits,crabs,serpent star,large feather duster |