We always state that IBC’s are agitated before they are drawn off and dilution. There are 2 alternatives; an air line cable tied to a pole that can reach the bottom. Most of the time that works very well.
If however the product has been stored for a long time or maybe subject to warm conditions during shipment, it may have ‘dropped out’ more than usual (it is a suspension). Another alternative is to use a two handle ‘plaster mixer’ and to extend the shaft by cutting in two and welding both ends into a tube collar so that it can reach the bottom of the IBC. Within 10 minutes all should corrected and it should remain in suspension after that for another few weeks.