Make sure you put sandbags around the outside of it because you're going to put a lot of weight in there. A hose is like a flexible rubber pipe which you use to transfer water from the kitchen, perhaps, or from a tap in the back of your house. I don't know how much you like DIY. It's the expression we use to refer to when people do work on their home. So putting up shelves or fixing things in the home, do it yourself. Just a mind joke, I suppose.