how do they clamber onto land or do they have to keep finding that one corner each time before they get too exhausted from trying to get up some glass wall?
what method will you have in place to stop them dragging the soil into the pool? is the water filtered or have you to replenish with suitable water for their needs?
are you having places of shade for them to use from the lighting i assume you will be incorporating into the setup?
any updated pics?