The tile is actually a very good idea IMO. If I could afford to do so, I would probably drain my tank and silicone some tiles onto the bottom. I just don't want them just sitting in there to where poop can get under them. :/ Really like the idea though!
Mine aren't stuck down with anything, just cut 3 pieces to size and layed them in. Every 3rd day when I do my waterchange I lift a corner of the tile so everything that does manage to get stuck there (hardly anything if tile is cut to correct size) I can easily clean out. And the tiles only cost me $25.
If I was to do tile in another tank, I would silicone it in place.
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