looking for reef friendly repair glue.

[banditpowdercoat]

If you silicone it out of the tank, let cure 24 hrs. All is good. CA, (Cyanoacrylate) aka Crazy Glue is also reef safe. It's what most use to glue coral frags to the plugs

[Douglas]

That won't work, I'm affraid. The overflow is internal, the tank is established and running, and full of livestock. The egg crating was glued to the top edge of the overflow to prevent critters from flowing into the overflow. It can't be taken out, and allowed to cure.

[hillegom]

lower water level and use only internal pumps for a day while glue dries/cures

[04scoobysti]

Originally Posted by hillegom

lower water level and use only internal pumps for a day while glue dries/cures

+1

[JOEL]

You many be able to use loctite super glue gel I use it to glue frags