Really, really. really wish people would read every page of a thread before 'jumping the gun'. So far it's CLEAR, we are to use just the natural tiles, NO GLUE......NO GROUT........ETC. The people in beginning of this thread said right away that because of 'the weight of the tiles' nothing is needed to hold them down. There's really nothing hard about this.*** Please read the whole thread..........each and every post on it.*** MFKer's would never want some one to harm their pet fish!
I eventualy pulled my tile out. I was having issues with build-up under the tile, and the tiles themselves begining to accumulate some brown algae. Just FYI.
if you have a standard 55 gallon, you won't need to cut any tiles. four 12"x12" tiles will fit almost perfectly in the bottom. you'll have about 1/8" gap on the ends that's too small to notice but front to back will be perfect.
so if you have a 55 and were thinking about it but didn't because you were afraid to cut tile, do it.