We also use clay balls were you have your gravel (you can get these at hydroponics stores), I put them in mesh bags that are meant to hold fish filter media and stack the bags to give different levels then cover with moss or what ever you will use, I then back fill all the little cracks with lose clay balls so that the frogs cant get down behind them.
(you can see them a little on the left in this picture http://webzoom.freewebs.com/our_fish/clayballs.jpg )
AND good luck with the frogs they are so much fun
Michelle
(you can see them a little on the left in this picture http://webzoom.freewebs.com/our_fish/clayballs.jpg )
AND good luck with the frogs they are so much fun
Michelle