Mixing Ferrous Sulphate Heptahydrate

I am working on a project that requires mixing ~ 10 tonnes of FeSO4 in 25,000 litres of water. Does anyone have experience with mixing this product and could provide information on how miscible it is and the likely time it might take to mix this quantity? I intend to use a 35,000-litre batch mixing tank equipped with dual Series 45 Model GDFTGA agitators and high-efficiency fluidfoil impellers. Any information greatly appreciated.