I store my ro water in a plastic trash can with a lid. I mix my salt, marine buffer & Prime water conditioner myself. I also keep a heater (79 degrees) and a pump in the trash can to help mix everything before I do a water change. Yesterday, I look in my container, and there is a white chaulky film coating the sides of the can, all over the pump, heater & hose. What could that be? I've had the trash can about a month and a half. Two weeks ago, I noticed some tan sediment in the bottom. I rinsed it out with clean ro water, then filled it about a third full - now it's all white. WTF!