Is two part epoxy marine aquarium safe?

[Ron99]

Plain old epoxy putty is fine. The plumbing ones usually have metal mixed in so don't get one that is specific for pipe repair. I have been using stuff I get at my plastic supply shop for a long time with no ill effects. Packaging and colour is almost identical to the Two Little Fishies stuff the LFS sell.

[viperfish]

I have used every brand J&L sells and a couple that they don't carry (for good reason), try this http://www.jlaquatics.com/product/MC...put+Epoxy.html

You won't want to use anything else.