HI – if you have a sand filter you can use Natural Chemistry Stain Free to lift stains off stairs and the liner, and follow it up with FerriTabs to remove the iron from the water.

Stain Free can work in any type of filter situation – but FerriTabs are best in Sand Filter Situations. We have had people use them with cartridge filters, which has worked somewhat but the filter needs to be cleaned out every few hours. The same with DE. By far the best results in sand filters with either sand or glass media in them.