How to Remove Iron Stains from Swimming Pools
Iron is the most common type of metal/mineral staining in pools. So odds are good you'll run into brown rust stains in your pool. In this how-to, we show you how you can remove them fast as well as how to prevent them in the future

What You’ll Need

Pool Stain Treat®

One (1) bottle per 20,000 gallons

Brush

Regular nylon pool brush

Liquid Acid

Approximately one gallon of Muriatic acid per 1600 gallons of pool water

Chlorine Neutralizer

About 2 oz. of sodium thiosulfate per 10,000 gallons

At a Glance

steps

min. work

day results

4 Steps to Remove Iron Pool Stains

Step 1: Lower chlorine to 1.0 ppm

Lower your chlorine reading to less than 1.0 ppm by either using chlorine nuetralizer or abstaining from adding your sanitizer for a few days.

Step 2 (Optional): Add Liquid Acid

Lower your Total Alkalinity by using a gallon of Muriatic Acid per 20,000 gallons. You can add more as necessary.

Step 3: Add Pool Stain Treat®

Add one (1) bottle of Pool Stain Treat® per 20,000 gallons of pool water.

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WARNING: Dissolve first for color plaster, painted fiberglass & Exposed Aggregate

For colored plaster, painted fiberglass, exposed aggregate pools you will need to dissolve Pool Stain Treat® in a bucket of water first before pouring it into the swimming pool to prevent discoloration.

TIP: Round up

Round your pool up to the nearest 5,000 gallons for dosing.

TIP: Dissolve for wide stains

For wide spread staining, dissolve Pool Stain Treat® in a bucket of water and pour around the pool. This will help give an even finish.

TIP: Running your pump

If your pH is above 7.2, you can go ahead and let your system run. Otherwise, turn off your pump until your raise your pH to at least 7.2.

Step 4: Brush

After 5-10 minutes, brush the entire surface of the pool.

Iron Pool Stain Do's

  • Reduce your chlorine to 1.0 ppm.
  • Lower your total alkalinity 10 ppm or more
  • Dissolve Pool Stain Treat® in a bucket first for colored plaster, painted fibgerglass and exposed aggregate
  • Dissolve Pool Stain Treat® in a bucket first for widespread stains

Iron Pool Stain Don'ts

  • Don’t run the filter or allow the pump to kick on if your pH is below 7.2.
  • Don’t add lots of balancers or shock at one time. This can cause staining.
  • Don’t add Pool Stain Treat® directly on to colored plaster, painted fiberglass, or exposed aggregate surfaces. This can lead to discoloration.

 

Stain Prevention Tips

TIP 1: Balance with the Hamilton Index™

Lower your Total Alkalinity relative to your water hardness according to the Hamilton Index™

TIP 2: Minimize Shocking

Avoid shocking more than necessary. Shocking can lead to metals dropping out of the water and staining.

TIP 3: DIssolve before adding balancers

When using a non-liquid balancing chemical (such as pH increaser or granular acid), dissolve it first and pour it around the pool. This will minimize chances of metal staining.

TIP 4: Avoid baking soda for balancing

Switch from using baking soda to soda ash or borates to minimize chances of reacting to metals and forming stains.

TIP 5: Avoid metal algicide

Avoid using copper and silver based algicides that lead to staining.

TIP 6: Use a Stain Preventative

Consider using a preventative stain treatment such as Pool Stain Treat® to keep stains from returning.

Read More

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When debris is left on the bottom of the pool they form organic stains. Pigments present in leaves like tannin discolor the surfaces similar to a dye. In this post, we go over the quick way to removing organic stains from your swimming pool.

How to Remove Iron Stains from Swimming Pools

Iron is the most common type of metal/mineral staining in pools. So odds are good you’ll run into brown rust stains in your pool. In this how-to, we show you how you can remove them fast as well as how to prevent them in the future

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