Aquarium silicone

[Ringoffire]

Can any one suggest an aquarium approved silicon? Looking to build my own rock cave sculpture. And also is that the best thing to use to adhere rocks together?

 

[tonedogz]

GE no. 1 100% silicone

 

[Mifsud]

I've used General Electric's Silicone I caulk adhesive. It is 100% silicone

Be careful not to confuse SIlicone I with Silicone II. Silicone II is designed for waterproofing kitchens and bathrooms. It has additives that prevent the growth of mold. I don't use this because I don't know if the additives effect fishies and never wanted to risk it given the stunning success of Silicone I.