did not perform. I had 75% of a 2lb tube of JACKS MAGIC (cobalt etching stuff left over from 12 months ago) I sprinkled that in my pool and the stains disapeared as I watched) (pump shut off). Brushed sides of pool, the started pump, in the am ALL stains had gone!!! Marcite pool.
Jack's Magic The Copper & Scale Stuff (STAIN SOLUTION #2) is designed to safely and effectively remove copper stains and scale from all types of pool surfaces without draining the pool. In most cases, The Copper & Scale Stuff is more effective than acid washing the pool, and will save both time and money.
- For aggressive treatment of copper stains
- Works on all types pool finishes
- Please Note: must bypass heater when using this product
- To be used with one of Jack Magic's sequestering products