[Binx]

Henry, I believe your major buildup is calcium with a rust tint. I don't recall you using distilled water in your system with the additive. Remember where you live is the remains (Salt Lake) of a giant prehistoric inland ocean and your ground water is rife with calcium/lime from all those little shell critters. Try some Limeaway on those pumps. If those deposits in the pump foam up then it is a calcium problem.

Lonnie