Thanx! Yea they come through the bottom, the aquarium came like that, its one of the main reasons I chose it. Pipes bolt in and have 2 sets of O rings. Makes filter priming so easy too because its gravity fed. Its great. Its called a fluval vicenza 260 and it also came with the fluval 305 canister filter. Was a right bargin!Wow - nice setup! Assume the filter pipes are going right through the bottom of the tank? How are those puppies sealed against leaking?