Over the past few months, we have experienced some problems with algae growth in pools that were in perfect chemical balance and that had us scratching our heads.
After much research, and discussing this with problem with others in the industry who were experiencing the same problems, we have found the cause—phosphate!
It was discovered that phosphate causes algae to multiply if a supply is leaked into a body of water. Swimming pools have a tendency to build up large sums of phosphate because rainwater and fertilizers, which blow into a pool, contain large amounts of phosphate. Signs that phosphate is present in a body of water are as follows: cloudy or green water, slippery and slimy surfaces, mustard or green algae growth, excessive chemical consumption, and pool water quality. Phosphate also does not break down naturally, so the phosphate in a pool may remain there for a long period of time.
Sources of phosphate are:
- Human and animal feces
- Agricultural byproducts (fertilizers)
- Runoff from landscape and residential areas
Testing of all pools and spas for any indication of phosphate in the water should be performed. If a pool or spa is found to contain phosphate, you should treat the body of water with a phosphate remover. Small bodies of water, such as spas and wading pools, may be drained instead of treated. The cost of this treatment will be dependent upon the gallonage of the pool.
If you have any questions, or want more information regarding phosphate, please do not hesitate to give us a call. Here at Four Seasons Pool Service, Inc., we are constantly thriving to maintain the highest standards of commercial swimming pool and spa maintenance.