Been away doing outdoor projects, have to say you folks have been busy. The current tank has the exact type of pinholes that my Z tank had. I blasted the outside areas that I had possible issues, soda blasting would be better, but I was out, and sand was available. I only had one area in the back corner that must have been in water a long time. I had to cut out and patch that(about 4" square). The other spots had corrosion, but no actual holes, so I epoxy’d the corroded areas with an epoxy made for patching tanks. When I was happy with the areas, I sealed the openings, pressurized it to 10psi, then left it over night. No leaks in morning, so I then coated the inside with Red Koat (Oreilleys has it) making sure to cover the issue areas best. Then coated the outside in bed liner and reinstalled. Unfortunately I did not have the forethought to make the area accessible later, that’s really a great idea Doran. If it fails, it would likely be abandoned in place. Now the tank has rubber supports on the bottom, and a path exits bow to stern to allow moisture out. Added some pour foam, and my tank is locked in place. If I had time, I might weld up two tanks up front under the seats, and use 5/16" line for crossover. Filling would take place with the seats up, no filler on the side of the boat. Not sure I could get 25+ gallons, I would have to check. Hope this helps, Michael.
