soo as alot of you know im getting a 110 gallon tank this coming sunday (joy!) but the guy im getting it from isnt 100% sure (or even 50% sure for that matter) if he has a filter for it laying around that he isnt going to use.
SO im starting to research different filters in the event I need to buy myself one. for starters.. whats the real primary difference between canister filters and HOB filters? I understand that a canister filter gets the big chunk off the back of the tank, but what else does it do that makes it worth the oodles and oodles of dollars they cost?
and would it be as effective (if not cheaper!) to get a pair of penguin 350 filters for the back rather than a big canister filter?
and my biggest question of all.... why is there such a huge inconsistency between brands, GPH, and aquarium size? for example ill list a few
fluval 405 340gph 100 gallon tank
eheim classic 2215-37 163gph 93 gallon tank
marineland C360 360gph 100 gallon tank
penguin 350 (HOB) 350gph 75 gallon tank
hagen 428 (HOB) 500gph 110 gallon tank
thats just a couple. what gives, and what kind of flow do i ACTUALLY need?