Quote Originally Posted by Zhuisky45 View Post
Do your New rivers use the whole space and height of your 18x18x24?


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No ......they do not. They would probably be just fine in an 18" H.
I have a pair of sips in an 18 cube. They are happy and healthy.
My leuc group ( 5) , on the other hand , use every inch of their 18.36W.24H