I don't have the aquatop, but I have one made by sensen that is identical. And by identical, it is exactly that. I have had my fowl tank running for about two months now with no issues. I have two puffers, lion fish, trigger, and lunare wrasse. Also about 90lbs of live rock and about two inches of sand. No algae breakouts and everybody seems happy. Also water parameters are all 0's. I have no complaints. Bought it off of eBay for $99.