Jun 29, 2016 - When you can't get algae to take an extended summer vacation, and green or yellow algae always comes back to your pool, 2, 3 or more times . Aug 24, 2010 - I keep shocking with liquid chlorine but the green Algae keeps coming back. . 20*40 Liner pool with 8.5 foot diving end (Think it's about 25K) . Willing to try anything to get your pool back, you rub the lamp, and to your . Green algae is the basic, garden-variety algae (that may have actually come from your . It is also important to keep your chemicals balanced and leave your pump . Get rid of algae and keep it from coming back so you can enjoy a clean, clear pool again. . Slimy green algae also attaches itself to your pool walls and floor. Green algae is usually seen throughout the water, and clings to walls and steps. . A preventative algaecide will help keep it from coming back, as will extended .