How to fix small leak in overflow baffle?

[leevh]

Hello, I have a glass corner tank with an acrylic overflow baffle across the back corner (with the toothed top for the water to flow over). There is a small leak where it attaches to one side of the glass which causes my sump to slowly fill during maintenance and outages. I'm wondering if there is any quick patch I can do while I'm doing a water change and the leaky spot is accessible and out of the water?

thank you for any thoughts!

If not, it is a durso pipe back there that comes in through the glass near the top and is just an 90 elbow inside the tank. I might have to turn the elbow straight up so that the tank can't drain down as far in emergencies. If that presents any unseen problems, perhaps someone could point that out to me. Thanks again for any help.

 

[Joe31415]

Maybe a thick bead of gel superglue.
If not that, see if there's any reef safe caulk that's specifically meant for acrylic because the 100% silcone stuff we use for glass doesn't stick well to acrylic and certainly won't hold back a leak.
Some epoxy putty or jb-weld/water weld might work as well.

 

[ReefChasers]

Silicone but maybe from the inside so you can dry out the weir box as best you can.