Anyone used 3pt pallet forks with one of the 275 gallon square water tanks as a ballast? I need 1100 lbs and that seems an easy way to get there. I'd fill it with 150 gallons of water and antifreeze.
Exactly, especially with antifreeze in the water. I would consider a solid ballast, maybe concrete in a barrel or even make a box from OSB (chipboard) and fill it with cement with a drawbar mounted thru the box. When done you can remove the wood.
I would avoid the liquid idea. Just watching and FEELING the difference in a 300 gallon sprayer behind the tractor, the sloshing around would not be helpful. And if you were on a sidehill, the weight would shift to the downhill side, totally opposite what you need it to do.