My Marcite pool was looking "sick", so I turned off pump, gently applied Jacks Magic iron,cobalt,spot etching stuff. As the powder fell to the pool bottom, you could see the stains disapearing before your eyes!! After 10 mins I turned on pump and then brushed the pool sides, same thing stains went away. I did ISOLATE the pool heater from this process. (not that it was in use). All the metal was collected in the filter. I cleaned the filter AFTER 48 hrs, did not wish to dilute the powder that was ALSO in the filter. Worked fine. MKM were first class suport, as well !!!!
Jack's Magic The Iron, Cobalt & Spot Etching Stuff (STAIN SOLUTION #1) is a non-acidic product for removing iron, cobalt, and spot-etching stains from all types of pool surfaces without draining the pool. The Iron, Cobalt & Spot Etching Stuff will normally remove these stains easily and effectively within 48 hours, with minimal rebalancing of other pool chemical products.
- Rapid treatment of iron stains, etching and cobalt stains
- Great for fiberglass and vinyl liner pools
- Non-Acidic and Non-Toxic, why use acid if you don't have to
- To be used with one of Jack Magic's sequestering products
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