Well, I have a 2' x 2' x 4' stainless steel tank that I used to use for watering pumpkins with my Ranger. The weight of the water alone would be 998.4 (62.4245 pounds/cubic foot at 39.1 degrees F)...now, I admit that I probably wouldn't fill it to the top, most likely to 6" of the top (due to sloshing, even with the cover on) which brings it down to approx. 750 pounds of water. I haven't entered the weight of the tank itself, but I would guess it's over 50 pounds so up until this year (we had way too much rain to worry about having to water this year) I've honestly carried 800 pounds on a weekly basis...