i ordered the fission nano-skimmer. just under $29 with s&h. i hope it fits somewhere. the hood on the aquapod leaves no room above the water! but they say it's great for the aquapod. it's made by Current USA, who makes the aquarium as well, so... also put a $2 bag of carbon in the 1st filter chamber. just for a couple days. it was made for the aquaclear power filters. didn't see the point of buying anything expensive since i probably won't use it ever again once i start using RO/DI water.