I picked up a few totes that held 100% organic blue agave syrup. The residue syrup rinsed out well with hot water with no smell. One of the totes had some mold spots on the bottom, so I rinsed that out first with HW, then added several gallons of clear HW. I then added some calcium hypochlorite and the water turned brown. Repeated about 30 min later and brown again. I ran out of Ca2, so will have to wait before I try again.
I know I need to keep rinsing til clear/no smell, but I haven’t seen Ca2 turn the water brown when cleaning tubing. Anyone encountered this? Thanks!