Natural Chemistry Stain Free Extra Strength pool stain remover containerNatural Chemistry Stain Free Extra Strength, 7395 In stock$4599
Natural Chemistry Stain Free Extra Strength pool stain remover container

Natural Chemistry Stain Free Extra Strength, 7395

$4599
In stock

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Quick overview

  • Targets metal stains Formulated for the brown, gray and greenish staining that iron, copper and manganese leave on pool surfaces.
  • Ascorbic acid based Uses a blend of industrial strength ascorbic acid rather than a harsh acid wash.
  • No added phosphates Removes staining without putting phosphates into the water.
  • Dose by volume Applied at 1 lb per 10,000 gallons, broadcast around the perimeter with the pump running.
  • Pairs with a sequestrant Natural Chemistry directs you to follow with METALfree so the released metal stays in solution.
  • Hold off on shock Do not shock for at least a week after treatment, or the stain can come straight back.
Full description and specifications ↓

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Product details

Natural Chemistry Stain Free Extra Strength is a metal stain remover built on a blend of industrial strength ascorbic acid. It lifts iron, copper and manganese staining off pool surfaces and does it without adding phosphates to the water.

How the treatment runs

Balance the water first, then lower chlorine to at least 1 ppm. Chlorine is an oxidizer and it works directly against what ascorbic acid is trying to do, so treating a heavily chlorinated pool wastes product. With the pump running, broadcast 1 lb per 10,000 gallons around the perimeter of the pool.

Then hold the metal in solution

An hour later, add METALfree at 33.9 oz per 20,000 gallons. Removing a stain puts the metal back into the water, and without a sequestrant it simply plates out again somewhere else. Add a pulp based filter aid to a cartridge or sand filter, or make sure a DE filter is properly charged, then vacuum the pool slowly and thoroughly.

Afterward

Clean the filter after 24 hours, backwashing and recharging as appropriate for your filter type, then test and rebalance. Do not shock for at least a week. Continued weekly METALfree keeps the metal from staining again.

Specifications
Brand Natural Chemistry
Manufacturer part number 7395
UPC 717108073958
Chemical type Stain remover
Active chemistry Blend of industrial strength ascorbic acid
Pool type In ground, residential
Dose rate 1 lb per 10,000 gallons (38,000 L)
Follow up METALfree at 33.9 oz (1 L) per 20,000 gallons (75,000 L)
Phosphates None added
Shipping weight 1.85 lb
Ships Parcel

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Customer reviews

Questions and answers

What people ask about this product, answered by our pool techs.

What kind of stains does it remove?
Metal staining. It is built around ascorbic acid, which is what lifts iron, copper and manganese deposits off pool surfaces.
How much do I use?
Balance the water first and bring chlorine down to at least 1 ppm, then add 1 lb per 10,000 gallons around the perimeter of the pool with the pump running.
Do I need anything else with it?
Yes. An hour later, Natural Chemistry directs you to add METALfree at 33.9 oz per 20,000 gallons so the metal that came off the surface stays held in the water rather than settling back onto it.
Can I shock the pool afterward?
Not for at least a week. Shocking too soon re-oxidizes the metal and the stain returns. If chlorine drops very low, add small amounts and stay under 2 ppm.
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