Green algae floats in the water, making it cloudy and giving it a greenish tinge. Slimy green algae also attaches itself to your pool walls and floor. Poor filtration . The easiest way to keep your pool clean and algae-free is to destroy the algae . Wire brushes are great for plaster and gunite pools, but should never be used . Jul 3, 2017 - A brand new, freshly-plastered swimming pool turned green from copper. Why? . My first thought was algae when I saw the color of the pool. But that . The customer had a problem that we alone could not fix. CULator is a . Jun 27, 2014 - Stains of course, but over time, algae and poor water chemistry will begin to erode the pool plaster, with etching and deposits, and weaken vinyl . Green pools that sit too long can stain the plaster of your pool. If staining . If so, a chemical shock may be sufficient to remedy your algae problem. Over a 3-5 . The most common form of algae in swimming pools is 'green' algae. . Black algae is more typically found in concrete or plaster finished pools because of their . Swimming pools often turn green without much use. Learn how to fix a green pool with this instructional guide from Bunnings Warehouse.