Plan the perfect garden with our interactive tool →

How to Use Aluminum Sulfate in a Swimming Pool

Warning

Don't let aluminum sulfate touch your skin, and wear safety goggles and gloves while you're working with it. Aluminum sulfate can cause chemical burns.

How to Use Aluminum Sulfate in a Swimming Pool. Your pool might have cloudy water for numerous reasons, but if it's due to excessive minerals, clean your pool with aluminum sulfate. It has a positive charge when it's dissolved in water and attracts the negative particles until they solidify into chunks, making it easier to clean the water.

Check the alkalinity of your pool. The alkalinity must register more than 75 milligrams per liter as calcium carbonate for the alum to work.

Backwash your filter according to the instructions for your filter. Sand filters use a different process than DE filters, and you can use alum only with sand filters. It can damage DE filters.

Add the recommended dose of aluminum sulfate for your pool to the most convenient entry point before the filter. This is normally the skimmer, but add it slowly because it can become localized there, rather than moving all the way to the filter. Read the instructions that come with your aluminum sulfate, but a good rule of thumb is to add 2 oz. of alum for every square foot of area on the pool's surface.

Clear your filter of sediment after a few days. Repeat the process until the cloudiness caused by minerals is gone.

Related Articles

How Much Diatomaceous Earth to Use in a Pool?
How Much Diatomaceous Earth to Use in a Pool?
Problems With DE Powder Laying on the Bottom of the Pool
Problems With DE Powder Laying on the Bottom of the...
Pool Maintenance for Beginners
Pool Maintenance for Beginners
How to Clean Above Ground Pools
How to Clean Above Ground Pools
Diatomaceous Earth Pool Filters Troubleshooting
Diatomaceous Earth Pool Filters Troubleshooting
How Can Stains Be Removed From a Gunite Pool?
How Can Stains Be Removed From a Gunite Pool?
How to Remove Black Stains From a Pool's Water Line
How to Remove Black Stains From a Pool's Water Line
How to Control Water Hardness in Swimming Pools
How to Control Water Hardness in Swimming Pools
How to Add Epsom Salt to Swimming Pools
How to Add Epsom Salt to Swimming Pools
What Is Calcium Chloride for Pools?
What Is Calcium Chloride for Pools?
How to Remove Algae From a Pool Bottom
How to Remove Algae From a Pool Bottom
How to Troubleshoot Swimming Pool Scum on the Surface
How to Troubleshoot Swimming Pool Scum on the Surface
How to Make Your Pool Sparkle
How to Make Your Pool Sparkle
Gypsum Vs. Lime for Soil
Gypsum Vs. Lime for Soil
Problems With Pool Ionizers
Problems With Pool Ionizers
How to Flock the Pool
How to Flock the Pool
Garden Guides
×