wot van as you nead to get tank thats with in wate limet of your van ,its best to get the largest for van saves biying biger later ,my ro and di in garage king span insuaion ronwd it for frost ibc out side ,sub pump to trance fer to van ,bordxe hidera pole 17 ft for 95 percent of work use and abuse all day iv got 25 hidra for thee story and sl 56 but sl56 for later ,gardenas for rest of your stuf .