hey picked up a tank recently thats acrylic with built in center overflow. noticed today when power went out that my sump level went past what i normally have it at. after i looked everythingover. inoticed a small leak on the seam where the overflow meets the back wall. its also at the very bottom. since then i drained the tank andnot its drying. its barely noticable but i wouldrather be on the safe side than tobe waking up with a pool in my room. i have a tubeof weldon 16 left from a past project. now for me its really a toss up of fixingthe overflow withweldon on the outaide of the box. or seal it all up and run external canister and a hob. im worried the seam would randomly give and flooding the house.