Quote Originally Posted by IrishRonin View Post
If this is true then the only thing I can think would be safe would be aquarium silicon, which sucks cause it come in a small toothpaste style tube and is much more expensive
It comes in standard tubes as well. At Home Hardware (a Canadian chain, sorry) their standard house brand silicone is labeled as aquarium safe and is something like $10 for 3 300mL tubes. I've been using it with no problems for a few years. It only comes in clear or white though.