Ok So I have been searching everywhere for a suitable tank to make my storage out of. I believe I have finally found some. Due to my space limitations I am going to have to use 2 or 3 tanks to get my water volume up. How do I calculate how much storage I need? Where can I find instructions on how to prep the tank and make it into storage? I know I will need to have an in and out. I believe I need to feed thehot in the top. Then I would go out the bottom to the top of the next tank? Is there any other pipes that need to be welded onto the tank?