Mr Pleco;3701992; said:Really? Define "Whole Lives"? I have 6 Discus that have outgrown a 90 gal tank?
Skip the 55 too narrow, min would be a 75 for me which can be picked up on craigs list ,pumps and stands for under 200.00
75 Gallon. 48x24x24
Whole lives means just what it says. 6 discus do not get large enough to out grow a standard 90 gal. Discus only reach about 8" max. and are not big swimmers. Use water changes to maintain water quality. A 75 gal. is a good tank for discus with it's 18" width. I used a 55gal. in this project because of it's low cost. By the way, a 48"x 24"x 24" tank holds approximately 120 gals.