Originally Posted by Reefer James
There's some pretty sturdy silicone. I'd fill it with UV
catalyzed fiberglass then cover in silicone.
Thanks for the insight. Im not familiar with fiberglass, where could i usually get some and how is it applied?
I took a picture incase my explanation wasnt the easiest to follow. Hard to see, but if you look on the vertical seam near the bottom is where the gap is the most. The guy i purchased it from had it filled as a turtle tank (not to the top) and i had it holding water pretty good with it only seeming to leak once it got 3" or so from the top. So it might seal ok once i finish up and silicone it, but i worry about structural integrity since its alot of water if it ever failed lol Also in the pic are those two round marks which id assume is a previous crack fix? lol