How to Keep Green Slime Out of a Filtered Swimming Pool

Scrub the swimming pool walls once a week, using a nylon brush. Brushing also protects the liner.

Vacuum the floor of the pool with the pool vacuum cleaner once a week to keep algae from forming.

Check the skimmer baskets once a day. If you see debris inside, empty them out so your filter operates at peak efficiency and resists green slime.

Replace the pool cartridge filter according to the schedule recommended by the manufacturer. Between replacements, regularly remove and rinse off the cartridge with a garden hose.

Talk to a professional at your local pool supply store about the best mix and ratios of pool chemicals for your climate and pool type. Every climate has different requirements, so consult a professional and test the water often. An imbalanced pool can be a breeding ground for green algae. Some specific pool chemicals include chlorine, algaecides and clarifiers.

Shock the pool water at the first sign of green algae or slime. Don't wait for the problem to get out of hand. The amount of shock will depend on the weight of the water in your pool. To calculate the weight of the water in pounds, multiply the number of gallons by 8.34. Divide that answer into a million, then divide the result into 10. The final number is the number of pounds of shock you'll need. Add the shock to the deepest side of your pool and turn on the filter to distribute.