Friends, sorry to ask this here... Just wanted to know where I can an aquarium safe adhesive. My lfs doesnt have it and I want to make a similar cave for my Fronts...Kindly advice...
Just about any hardware or home improvement store; heck, maybe even some auto parts stores.
Just make sure it's 100% silicone, without any anti-mold chemicals in there. Anything that says "Anti-####", or "####-Resistant" will most likely have extra chemicals in there.
I use a tube of GE brand "Silicone I*, 100% Silicone Rubber Sealant". It's labeled as "Window & Door". I've done a few rock cave structures with this stuff, and it works like a charm.