Pool Water Treatment

Remember to always use caution when cleaning and adding chemicals to your pool. Never mix chemicals before adding them to your pool, and always read directions and follow the instructions provided by the manufacturer to ensure the highest level of safety. If you are unsure of any of the procedures above, it is best to contact a pool professional to help maintain your swimming pool. 

Cloudy Water

Cloudy/Dull Water

If you are experiencing cloudy or dull water, there could be several causes:

  • Your filter may be unable to remove small particles
    • You can use a water clarifier. When used on a regular basis, it can prevent small particle accumulation.
  • Your filter may need to be cleaned
    • Clean your filter at least twice a season with a filter cleaner to remove scale, dirt, oils and grease for maximum efficiency. Be sure to keep your filter running 6-8 hours a day and backwash regularly, if applicable.
  • Your chlorine level may be low
    • Shock the pool to quickly raise the chlorine level. To prevent your chlorine level from getting too low (less than 1ppm), use shock as part of your weekly maintenance schedule.
  • Your pH level and/or alkalinity may be too high
    • Test pH and total alkalinity levels every few days balance as needed. This level should be between 7.2-7.6.
  • You may have a high concentration of dissolved metals in the water
    • You can use a stain control to prevent and remove metallic stains from vinyl, fiberglass, plaster, gunite and concrete pool surfaces. When used on a regular basis, a stain guard can prevent the buildup of dissolved metals that can cause staining.

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Cloudy Green Water

Cloudy/Green Water

If your water is cloudy with a green color, you may be experiencing green algae.

  • To combat green algae, you should perform the following steps:
    • Check that your filter is operating properly
    • Clean your filter with a filter cleaner
    • If necessary, add the recommended algaecide for the type of algae you have to kill the algae
    • Add flocculent to your pool to drop the small, non-filterable particles to the bottom for easy removal through vacuuming
    • Be sure that you are using an algaecide as part of your weekly pool maintenance and keep your chlorine level at 1-3ppm.
    • Check for metals in the water. Copper can cause the water to have a clear green look to it.

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Black/Dark Green Spots In water

Black/Dark Green Spots

If you can see black or dark green spots in your pool, you may be experiencing black algae.

  • To eliminate black algae, complete the following steps:
    • Check that your filter is operating properly
    • Clean your filter with a filter cleaner
    • Add a high concentrated algaecide such as a 7.4% copper-based algaecide
    • Brush the algae spots with a stiff brush
    • Repeat algaecide treatment if necessary
    • Vacuum algae debris and particles from the bottom of the pool
    • Be sure that you are shocking and adding algaecide weekly as part of your pool maintenance routine
    • Have the water checked for metals.  Black spots that look like algae can sometimes be a metal stain.

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Mustard Algae

Yellow Slime

If you have the presence of yellow slime on your pool surface, you may have yellow or mustard algae.

  • To eliminate yellow/mustard algae from your pool, you should:
    • Check that the filter is working properly
    • Clean your filter with filter cleaner if necessary
    • Brush the affected areas
    • Add a 7.4% copper-based algaecide – designed to control mustard algae
    • If necessary, add flocculent to the water to drop the particles that are too small to be filtered to the bottom of the pool
    • Vacuum the pool to remove debris

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Reddish/Brown Water

If your water has a reddish or brown tint, you may have too much iron or manganese in the water.          

  • To eliminate excess metals in your pool, you should add a stain control to reduce the buildup of metals in the water. This can both remove and prevent metallic stains from vinyl, fiberglass, plaster, gunite and concrete pool surfaces. A stain control should be part of your regular maintenance routine.

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Clear/Green Water

If you are experiencing water that is green yet clear, you probably do not have an algae issue - but perhaps too much copper in the water.

  • By adding a stain control, you can reduce the buildup of metals in the water. You should test the water for pH and total alkalinity levels. Your pH level should be between 7.2 – 7.6, so add pH up or pH down as necessary.

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Rust/Stains

If you are experiencing rust or stains in your pool, there are a few possible causes:

  • You may have excessive amounts of dissolved metals in your water          
    • You can use a stain control to prevent staining from iron, copper and manganese. You can prevent future stains by using a stain control at least once a month.
  • Your pool water may be unbalanced
    • Test your water to determine the pH and total alkalinity levels. Your TA level should be between 120-150 ppm. Add pH up or pH down to bring the pH level between 7.2 - 7.6. Be sure to test your pool every 2-3 days to ensure proper water balance

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Calcium/Scale Deposits

If you are noticing calcium/scale deposits in your pool, there could be a few reasons:

  • Your pH or alkalinity levels are too high
    • Test your pool water to determine the pH level and add pH up or pH down to bring the level to the range of 7.2 – 7.6.
  • The calcium content may be too high in your pool
    • Dilute your pool water with water of a lower calcium hardness. You can also add a stain control to prevent calcium buildup in the filter plumbing and on pool surfaces.

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Eye irritation

Skin/Eye Irritation

If your swimmers are experiencing skin and/or eye irritation, there could be a few causes:

  • Your pool may have the presence of chloramines in the water.  Your pool needs to be shocked.
  • Your pH level may be too low. You should always keep your pH level between 7.2 – 7.6. You can add pH up or down to adjust the level.

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Strong Chlorine Odor

When you have a strong smell of chlorine coming from your pool, you are actually smelling chloramines (mixture of chlorine and ammonia). This usually indicates that your pool water is not properly balanced. To remove this odor and return your pool water to proper balance, you can use a recommended shock (oxidizer) to remove contaminants while making your pool water sparkling clean.

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