Well I am just going to put this out there for any ideas and or possible help I have one idea of my own but not sure if it will work... Any way to the problem at hand I have a 270 gallon acrylic tank and I just moved it everything seemed fine but now I am seeing some salt creep out of one of the bottom end seems (OH CRAP)!!! the last thing need is for 270 gallons of water on my floor I can wipe it away but its back in a week even if I wipe it clean and wait 30 min I can feel a little bit of dampness I am worried.... the end that is leaking is up aginst a wall and this is pretty much built into a cavity under my stairs... I dont know if there is anyway to seal acrylic or use weld on for a permanant from the outside I could cut a hole in the sheet rock if that is possible. But I am thinking I am going to need to empty the whole tank and weld on some squareacrylic pieces on the inside of the tank for supprt and to seal the inside of this tank before I have a blow out any other IDEAS would be GREAT any help would be good as well I can compnsate for supplies/time as I am not an acrylic professional.. THANKS ANDY