Now that I had a new tank I had to come up with some more cash to by another filter. The Tetra was not going to work with what I had planned for Oskar's new home. So I decided to keep the Fluval 206 and then buy a new Fluval 406 canister filter. Every turtle care guide I read said that the filters you have should be rated double the aquarium size. With a Fluval 206 and 406, the combined filters are rated for 140 gallons. Also, I had to do a little maintenance and clean up on the old Fluval 206 which was a little easier said than done.