I switched from Sand to Tile then to a rack system with paper substrate. When I had the tiles, I had extra tiles that I would swap out with the dirty ones, making the transition in the tank the easiest and quickest possible. I didn't want to stress out my leos too much.
My tank is a 20G Long which measures, I believe, 12"x29.5" on the inside floor. So I just bought 6"x6" tiles and had to cut off half an inch, with a tile cutter, on the two at one end so they would fit. At first I liked it, but the time spent cleaning and dissenfecting two tanks and about 16 tiles, was too long. That's why I switched to a rack system with paper substrate.
I little tip: You may notice that the silicon sealer in the bottom of the tank creates a rounded corner at the bottom of the tank. This makes it hard to line the tiles up. What I did was buy some styrofoam insulation from Home depot and cut a peice the size of the tank bottom. Once you do that, you can wedge it into the tank floor and this will create a flat surface 1/2 inch above the floor. This will give you sharper angles that the tiles fit into better. The styrofoam also protects the tank incase you drop a tile while moveing one.
You can buy a package for about $5. It comes with 6-8 sheets that are plenty big. Just cut it with a sharp razor blade.
-Jason
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LEOS:
1.0 Tremper Giant Albino (Diesel)
0.1 High Yellow (Ayla)
0.1 Hypo (Red Sonja)
0.0.3 Juvies (Dremel, Ryobi & Mufasa)
R.I.P. (Conan)
CATS:
2.0 Maine Coons (Sam & Tye)
FIANCÉE:
0.1 Tall Blonde (Christine)