4. Where does algae come from? How can I get rid of it – or better yet – prevent it altogether?

Algae are tiny microscopic plants that enter your pool by rain, wind and fill water. If allowed to grow unchecked, your water will quickly become unusable. One ounce of water can contain millions of algae cells before they are visible. They can clog filters and reduce water circulation and the effectiveness of pool chemicals. The main types of pool algae are:

Green Algae: The most common type of algae and also the easiest to prevent or eliminate. Green algae are free-floating and can turn a pool green in a matter of hours. They can be found in all types of pools.

Black Algae: A filamentous growth on the rough surfaces of the pool. It appears as black slippery spots on the pool surfaces (walls and floor), and also forms a protective coating.

Mustard Algae: Appears as orange, yellow or mustard spots on pool walls and floors, forming on the shaded side of the pool. It’s an easy algae to brush off, but a difficult algae to get rid of. It can be found in all pool types.

Sanitizers and shock treatments do not have algae prevention as their primary function. The best preventative is the use of an algicide as part of your regular maintenance program.

If you already have an algae infestation, take action immediately. Different algae types may be more resistant, requiring specialized treatment. Treat these infestations with the appropriate algicide product. Always add algicides directly into the water, near visible algae growth. The day after treatment, brush walls, vacuum the pool thoroughly, and begin using an algae preventative.

For algae treatment info, click on the appropriate algae type listed below:

For treatment of green, black or mustard algae, go to PoolCare/Algae

(For product information, go to Algicides.)

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This analysis is designed for use only with the Pool Time® brand products named in this computerized water analysis printout, and is correct to the best of RWP, Inc.'s knowledge. RWP is not responsible for any use of this printout with products other than the Pool Time ® brand products named in this printout, and use of this printout with other products could result in improper or incorrect treatment of the pool water.