Be careful of using pebbles that are small enough to be swallowed by the frogs.

What I would do is to use a pice of plexiglass and put a thick layer of aquarium grade silicone and embed the pebbles in the silicone so the frogs can't
swallow it.



Quote Originally Posted by Bnagy View Post
I am purchasing a fluval 105 canister filter and drilling for a bulkhead on mine. Will work great. I am also going to do a sloping pebble side to the Exo terra for the frogs to enter and exit easily. The bulkheads will be on opposing sides of the exo terra to insure proper filtering. The pebbles or small rock will allow water to flow and filter easily.