65 tall or 55 long?

[AndreyDaGiant]

my 65 tall is 36x18x24 my 55 long is 48x12x18 do discus like to swim up and down or side to side? or which tank do you think is best to put 6-8 2.5 inch to 3.5 inch discus in?

[Ryan925]

Length is better

[Filip]

Length is better

Agreed.
Discus prefer length. Tall tanks are more suitable for Altums.

[AndreyDaGiant]

sorry but what are altums?

[two utes]

sorry but what are altums?

Altums are angelfish....Personally I'd go with the larger capacity tank, the 65 :)

[MD.David]

Go with taller tank, I believe discus prefer taller vs wider.

[Filip]

Altums are angelfish....Personally I'd go with the larger capacity tank, the 65 :)

I agree with this also . Although length is preferable the second option here holds approx. 20% more water, and more water means more capacity for toxin delution thus always a better option then less.

[AndreyDaGiant]

thanx for all answers I prepping my 65 now getting ready for my new discus stock thanx and I will be shore to upload lots of pics when its done!

[Dhavalsp]

I would go with 65 G, more capacity...

one thing to worry about, I have seen that if the tank is in busy area and for some reason your fish are too skittish, they will keep running into glass more often if you go with taller instead longer tank.. with a group 8-10 you may not face this problem...

[Willie]

I'm more in favor of 18" deep tanks. Looking down, the 55 is just a long, narrow alleyway for your fish.

That said, both tanks are a little too big for 2.5" - 3" discus. Smaller discus do much better a little crowded as long as you change water. (If you don't change water, it doesn't matter what tank you use.) I favor the 65, but maybe only half full and you can add more water when the fish looks crowded.

Good luck, Willie