Silicone cure time?
 

I would like to silicone a hook to the inside of the glass in my tank. That means I have to drain it below that level until the silicone cures. How long before I can raise the water again? I was hoping no longer than a couple hours.

I know they say it takes 24 hrs to cure fully. But I just want it to cure enough so that it won't poison my corals or fish. My tank will have to be disconnected from my sump during that time, and don't really want to leave it that way for too long. I do have internal pumps, so will some internal flow, and a heater.

I tried other means to attach the hook, incl crazy glue and even reef glue (probably the same stuff). It stuck fine to the hook, but not to the glass.

I'm not sure on silicone cure time but if it helps you can buy plastic hooks with suction cups for hanging things in the shower as a possible option.

Thanks for the suggestion. But these are small plastic hooks that I use to hang a frag rack at the back of my tank. I already use them in my other acrylic tank, where krazy glue and frag glue worked. But unfortunately, they don't stick to the glass. So I want to resort to silicone, which does work on glass,... but I don't want to poison my tank.

I would personally wait 48 hours to be safe. It shouldn't hurt anything in the tank as long as theres flow, heat and light. Like we all know in this hobby... patience is key to success.

Yes, wait minimum of 24, preferably more. If it still smells, then its not cured IMO.

OK, thanks, guys. I will hold off doing this for now. Does anyone know of anything else besides silicone that will stick to glass and will not harm fish or corals?

A magnet somehow? Glue hook to small magnet then you could move it around?

Just pick up a small tube of orca glue and use that

Does it stick well to glass? And where do I get that? I did drop into J&L, and all they had was the $35 tube. Kind of defeats my purpose (a cheap frag rack).

If you have crazy glue already, go get a used magfloat and make that into a frag rack. Lots of people do that, its cheap and it can be moved easily.

https://www.youtube.com/watch?v=SwVIzwz92ls