I just resealed a new 55 gallon tank, I'm going to be leak testing it today and tomorrow. Is there anything I should look for, besides water leaking out? Any small signs that the seal is weak, or will leak in the future?
I would say bubbles in the silicone would be the main thing. Just make sure to let it cure long enough(you may have done that already). But one thing is....if it does leak, you will have to completely redo it all again as the fresh silicone won't stick to what you did already.