Habitat - Indoor :: Rocks/gravel/ect for tank?

[foxxyboxx3]

I had previously used fish gravel but changed to larger rocks because I heard the trurts will eat the fish gravel and after removing all the gravel I had found they did indeed eat the gravel. So I'm using a mixture of smaller/larger rocks but it doesn't filter the poop the same way the gravel did and I got a brilliant idea to use cat eye marbles, would that be okay?

[Diamondbacks4Life]

As long as it cant fit in the turtles mouth it should be fine.

[foxxyboxx3]

Okay, my turts are too small to eat the marbles I just didnt know if the chemicals in the glass could possibly harm them

[steve]

Glass ones should be OK, though I notice a lot of them crack easily. Artificially colored rocks leech colors too.