Aug 1, 2014 - To remove algae, your pump and filter will need to run continuously for . Before adding Leslies black algae killer, remember to loosen up . May 9, 2014 - Keep your pump and filter running. Give the shock a good 12 to 24 hours to work it's magic. If the algae hasn't cleared up after 24-48 hours, . Pool filter and pump; Vinyl liner; Heater; Automatic pool cleaner If you click this link . and chlorine (DiChlor or TriChlor), when combined, creates a deadly gas. Sanitizer isn't enough to keep algae from invading your pool. . If you have a multi-port valve on your filter, shut off your pump and turn the valve to Recirculate or . Simply pick the correct sized PoolRx unit based on total gallons, clean your filter first, then, drop the PoolRx unit into the pump basket or skimmer. The specially . Plus, algaecides can even extend the life of your pool filtration system because . algae in your pool there is less organic material to block your filter and pump. The six deadly pool purchasing mistakes are frequently made as a result of . Try to make sure your pump, filter and heater are from the same manufacturer. May 4, 2015 - . in your pool. Learn how to rid your pool of pests, once and for all. . Ok what if my pump is down and I can't filter my water? There are a few . Blast It is a weed and grass killer used primarily under vinyl pool liners on above ground pools. Nutsedge (Nutgrass) can penetrate vinyl pool liners used in . Heat is a killer for pumps and your pump should never get too hot to touch, as a filter that is too small, or plumbing that is too small, will cause the pump to .