Possible Cause: 

  • Dirty filter - Solution: Clean filter with filter cleaner or replace filter media (SAND, CARTRIDGE, D.E.)
  • Filter and Pump not operating the required amount of time needed to properly filter and circulate the pool water - Solution: water movement is key to clear water, calculate how much time is needed to turn / flip the amount of water your pool has at least twice a day. this should be done in the day time while the sun is strongest. (best recommendation run the Pump and Filter morning till night

Preventative Maintenance: Backwash as necessary and clean filter thoroughly as needed. Have some sort of timer to operate your pump.

Possible Cause: pH too high

Solution: Test pH and total alkalinity. Adjust as required.

Preventative Maintenance: Test frequently and maintain a pH of 7.2–7.8 and a total alkalinity level of 120 - 150 ppm.

Possible Cause: Free chlorine residual too low

Solution: Test for chlorine residual and adjust as needed with a sanitizer, such as chlorinating tablets, or Treat with shock oxidizer.

Preventative Maintenance: Maintain free chlorine level of 1-4 ppm.

Possible Cause: Filter not removing small particles

Solution: Use a clarifier to coagulate small particles. Check filter operation.

Preventative Maintenance: Use a clarifier weekly to prevent and clear.

Possible Cause: Backwashing sand filters too often

Solution: Backwash less frequently, only as recommended by the filter manufacturer’s directions.

Possible Cause: Dissolved metals in the water

Solution: Use a sequestering agent to control metals in the water.


Follow these 5 key steps to maintain your pool

Keep in mind . . .

Each key is important for proper pool care. Consider each key as a simple, preventative maintenance step. Pool care can be simple when you have a plan for routine maintenance and use the right products.


Pool water must be circulated to maximize your sanitizer’s effectiveness. The more the water is in motion, the harder it is for bacteria and algae to grow and take hold. Debris is also pushed out and captured by your filter during circulation. The best time to circulate the water is during the day for about 12 hours or more.


Your filter is one of your most important pieces of equipment! It should be backwashed (cleaning by the removal of material trapped on or in the filter media) when the water pressure in the filter reaches 8 to 10 psi above normal. Make sure to check your manufacturer’s guidelines. Filters also need to be chemically cleaned to remove the oil and debris that backwashing doesn’t catch. 


Your filter doesn’t catch everything; some pools have areas with little to no circulation and this is where problems occur. Brush and vacuum your wall and floors at least once a week to catch the debris that your filter misses.


Every pool has characteristics that need to be regularly measured and adjusted. Your pH and sanitizer levels are the most important factors to check. Test your water two to three times per week with heavy to typical usage. Additionally, take your water to your BioGuard dealer at pool opening, closing and every four to six weeks during the season. This will keep your pool in check.


The last key in pool care is applying the right products at the right time. Follow the steps provided by your BioGuard Dealer to have welcoming, brilliant and sparkling water; swimmers protected from disease transmission; and protected pool equipment and surfaces by having properly balanced water.