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Home > Chemicals > Natural Chemistry > Metal & Scale Control
Natural Chemistry Stain Free 1.75lb
Natural Chemistry Stain Free 1.75lb
Part #: 07400

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Product Specs

All Natural Stain Eliminator

Stain Free is an all-natural stain remover that contains a blend of industrial strength citric acid. Quickly removes metal staining without adding unwanted phosphates to your pool water.

  • Less expensive alternative to ascorbic acid
  • Ideal for fiberglass pools
  • Non-toxic and will not harm the environment
  • Compatible with all sanitizers and pool surfaces
  • Phosphate-free formula


1lb per 10,000 gallons (38,000L)

How to Apply:

1. Balance pool water

2. Add 1lb of StainFree per 10,000 gallons (38,000L) of water. With the filtration system on, walk around the pool and sprinkle the product evenly on the surface. Lightly brush the stained areas

3. One hour later, add METALfree to pool water at the rate of 32oz (1L) per 20,000 gallons (75,000L)

4. 24 hours later, vacuum pool thoroughly (sides, bottom, steps, etc) and clean filter

5. Test and balance water if necessary


A non-polymer filter aid must be used in sand filters with this product

Do not add any chlorine or shock treatment until the pool surface has been thoroughly vacuumed and filter cleaned DE and cartridge elements should be removed and cleaned, sand filters backwashed

Features & Benefits:

  • Ideal for treating staining on all pool surfaces
  • Not a harsh acid
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