It's finally happening. We started Sunday with it. Today my hubby done the second roll of blocks. I'm going in a little bit to get cement to fill the blocks up and maybe we'll get it poured tomorrow. We are starting with a 10x12 building, and going to try to have 3 rolls of tanks and have 3 shelves too. I plan to have them plumbed together. If I do well enough we may build on, or look for me a place to rent and start up a pet shop. Don't know yet we'll have to see. Does anyone have any links to a DIY with instructions on a plumbing system without having any drill holes.