Simply place in pump basket or skimmer basket; Eliminates all types of Algae; Reduces Chemicals; Effective for up to 6 months; Simplifies Pool and Spa Care. 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 . Leslie's 14021 Half-Gallon Black Algae Killer. . Black Algae Problem Solver! This unique blended formula is the best algaecide to use for stubborn algae such as black and mustard algae in all swimming pools. May 4, 2015 - These are meant for standing water (ponds, unused pools) which is ideal for a pool with an out of commission pump. This dunk releases a . Sanitizer isn't enough to keep algae from invading your pool. Get rid of . Be sure to check whether you need to top off your water before turning on the pump. Heat is a killer for pumps and your pump should never get too hot to touch, it should not smell 'hot', and it should not turn itself off. Any of these symptoms are a . 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 . Super Algaecide Algae Killer . life of your pool filtration system because without algae in your pool there is less organic material to block your filter and pump. 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, . While everyone agrees on how to kill algae once it's taken over your pool, . the water as soon as possible; Vacuum and clean filters and pump baskets regularly .