I have a PG Magnum on order and trying to figure out what will be my best choice for hauling liquid. I also ordered the carrying rack to avoid pulling a trailer, so bed space could possibly be a premium? I'm thinking of using a 100 gal poly tank and a 12V pump to haul the liquid. Do you think the 100 gal tank would take up too much bed space(38"L x 30"W x 26"H)? 100 gallons would treat just over 425K. I know alot of you guys already know the do's and don't, so I would really appreciate feedback. BTW, all of this will be used on/in a fullsize (long bed) 3/4 ton P/U. As of now, I have two options on 12V pumps. A Shurflo 3.0 gpm or a 6.25 gpm. I'm looking at $75 vs. $190. I don't really want to spend an extra $115, but 3.0 gpm seems slow? With that being said, I don't want to buy something twice either. What do you guys think?