I would also like to give a littel input to this, a rubbermaid will never work to add baffels to it.. They are simply to flexible also silicon will hardly adhear to acrylic or the rubbermaid sump. you need to buy a acylic tank and add you baffels to it. check out the auction sites you can find them really cheap in just about any size. Also you said you are going to use a 100 gal and a 150 gal rubbermaid??? I have never seen one that big I know that it will never hold 150 gallons of water unless it was designed for it. 1300lbs in a plastic tub the walls will bulge out dramaticaly. But try it and find out for yourself I guess. just trying to save you the hassel.