overflow leak

My Marineland 300G started to have its second seam failure, so I tossed it and picked up a second-hand custom 84" L x 36" H x 26" D acrylic aquarium with a lovely built-in cabinet system. It has taken me a while to get this set up. I finally did the mail plumbing, and in doing a leak test of...

hello, I am dealing with another leak in the overflow box I sealed up the leak between joints but discovered a leak coming from the weir bulkhead. I have read a few threads about how to set the box up correctly and had it set up that was but it’s still leaking (weir, gasket , glass , gasket ...

TLDR at the end Hey everyone, I have been leak testing and solved a few plumbing/bulkhead leaks but I’ve never come across the problem with the actual overflow box leaking. It is leaking from the bottom where the back of the box meets the bottom of the box. I’m thinking it could be 2 things...