Caulk for Slate Tile

[SkiTrent]

I have 2 Red Ear Sliders and would like to increase the amount of water in my tank as well as giving the fish a place to hide and the turtles a place to bask. The idea is to take some 24" by 24" slate tiles that have broken or chipped in a recent house project and cut them into sections to create a basking area. It would have 2 legs and a top. This should be simple enough, but I had two questions.

1. Which caulk should I be using? I was thinking a simple clear silicone caulk. (eg. http://www.homedepot.com/Bath-Showe...splay?langId=-1&storeId=10051&catalogId=10053)

2. Do you think this caulk would work for tile?

3. Is there any issue with natural slate in a tank? From research on here I would say yes.
http://www.monsterfishkeepers.com/forums/showthread.php?t=398813&highlight=slate

 

[albyoscar]

i dont think slate would be bad for turtles , i have used it in fishtanks before. i would use aquarium silicone cuz reg silicone leaches toxins in water . how bout siliconing some small pvc pieces on the bottom of the slate it might make for a more stable platform

 

[SkiTrent]

i would use aquarium silicone cuz reg silicone leaches toxins in water .

Something like this?

http://www.homedepot.com/h_d1/N-5yc...splay?langId=-1&storeId=10051&catalogId=10053

how bout siliconing some small pvc pieces on the bottom of the slate it might make for a more stable platform

I am not sure I am following what you mean? Like as a brace of as legs? I want to keep the natural feel.