can you use cinder blocks in an aquarium? i just got a 110 gallon, and am trying to make a support structure for the rocks, as the tak is 30" high.


Not sure about blocks but I use bricks with no ill effect...These pics are a "catfish condo" that I threw togethor for 2 Eclips cats and 2 Bumblebee cats. All 4 are about 1.5" in length. Their is usually 1 cat per hole...
In this one you can just barely see the little guy in the bottom right hole...