Can someone out there tell me if it's ok or safe to epoxy some rocks together underwater in the aquarium, with fish & corals? Also how long does it take for the epoxy to harden the rock into place??
I only buy epoxy made for reef aquariums, only because I don't know what to look for at the hardware store as far as other epoxies.
But the stuff for fish tanks is totally safe, and you can use it underwater with corals in the tank. It may make your skimmer go nutz, so beware of that.
I am actually not sure how long it takes to harden, as when I use it try to not move the rock once I get it set right.
This is what I usually use. It says it's fully cured in 24 hours.