Our soybeans need manganese. Have added manganese in the past to my powermax with out an issue. Have had issues with generic roundup before. Tried a new foliar that has maganese, boron, and zinc. Mixed well with my non gmo chems. Started on my roundup beans using Abundant and this is where the issues started. My stainless tank on my Rowgator now has a hard candy like shell on the tank walls. plumbing all seems fine. Was able to get it off with a turbo nozzle on a 3000 psi pressure washer. What do I do with the parts of the tank I can't get with the presser washer (probably half the tank)? Tank cleaner doesn't touch it. Thanks for any help in advance!!!