- Nov 30, 2019
- 854
- Pool Size
- 8500
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
A friend with an IG vinyl pool says that he solved a chlorine problem by changing the filter sand. His FC was depleting rapidly although there was no evidence of algae in the pool or other condition that was causing it. His theory is that there was organic matter trapped in the old filter sand that wasn't being removed by back flushing. The trapped organic matter was using up chlorine as the water was passing through the filter. Once he replaced the old sand with new the FC and CC levels normalized. Is this a likely scenario?