Sump Repair, Patch Inside or Out?

I have a sump with a crack that needs to be repaired. I have Weldon 4 and 16. The crack goes from the top of the sump straight down, about 1/2 way.

I applied the Weldon 4 to the crack from the outside about two minutes ago, after I drilled a stop hole. I have a piece of acrylic that I want to patch over the crack with, but don't know if I should patch on the inside or outside. The problem with inside is the crack runs right behind the filter sock holder and the return line holder above it. Meaning that if I patch on the inside I would need to patch with 3 pieces, instead of one on the outside.

 

How soon are you able to get a replacement? I'm assuming it's glass but of course you could be talking about an acrylic sump as well. In that case you probably want to repair it in lou of buying a brand new one. Why not repair both sides and live worry free....

 

Patching the inside will give the best seal as the water pressure will help with the seal. Both sides would be best.

 

It is an acrylic tank, I guess both sides makes sense. Thanks guys!

 

How big is it? I'd see if petco has the $1 per gallon sale going on. I'd personally be a lot more worry free if I just got a new tank to use. Otherwise, I agree with what 2in10 said.

 

It's 30x14x16. I am going back and forth over using it. At this point it hasn't cost me anything other than the two bottles of Weldon, and a sheet of acrylic. At the same time, the better half is starting to wonder about my -her words- money pit, that has yet to see a drop of water. LOL

 

The main thing I'd consider is how bad a leak would be. If you live in an upper floor apartment, then a big leak could get you huge fines and they might make you get rid of the tank too. If it's in your own house (especially in a basement), it's a different story.

 

Well, I decided to fix it. I think the crack was from the box getting dropped by the shipping company, it didn't separate and I could barely feel it when I ran my finger over it. I put a little Weldon 4 over the crack, let it sit for a couple hours, and then I patched over that using Weldon 16 and a new piece of acrylic that I cut about 3 inches longer than the crack and at least two inches on each side of it.

Tonight after I got home from work I filled it and let it site for about 6 hours. No water leaked through, no bowing. There is a little crazing around the crack, but it doesn't look that bad.