Oh crap! I cracked my sump!

[Tom R]

I would silicone a piece of glass or acrylic over the crack.

[The Grizz]

Originally Posted by Tom R

I would silicone a piece of glass or acrylic over the crack.

Glass would be the best, if you use acrylic make sure you use some PVC primer on the edges. I would also put it on the inside of the sump to hold the pressure off the crack.

[banditpowdercoat]

Originally Posted by Tom R

I would silicone a piece of glass or acrylic over the crack.

Yup, I've repaired cracks below the waterline successfully like this.

[byee]

if you can, silicone another piece of glass from the inside of the tank using silicone. Make sure you put a nice bead around the edge of the glass to give it a good seal.