I have fluval 304 and 404 and 2 sunsun 304-b which I believe is the same as aquatop..not sure,but I like them just the same, both easy to clean and no problems with either of the sets .The only thing I dont like about the sunsun"aquatop" is the spray bar it comes with so I just take it off and hang the outtake just like the fluval which i believe makes the water come out with more force.