Jacks Magic Qt Salt Solution Purple The Purple Stuff Salt Solution is a one-of-a-kind stain and scale preventative for use specifically with salt chlorine generating systems. Traditional sequestering agents simply cannot handle the demand that high salt and high TDS (total dissolved solids) put on them. Most products are not effective in these situations, but The Salt Solution was designed for it! In addition to preventing swimming pool staining, The Purple Stuff also helps keep the chlorine generators cells from developing scale, which makes maintenance significantly easier.