It's a list of all the people and things I hate so much I want to hit them in the face with a shovel.. Concept coming from the Marian Keyes novel, The Mystery of Mercy Close (2012).
Use chlorine as your go-to algae killer. When your pool water is green or contains visible algae clumps, your pool does not have enough chlorine. Shocking the pool with a large dose of chlorine is the most effective way to kill the existing algae and bring your pool back to sanitary conditions.
Blue-Green Algae: Also called black algae, you can spot the dime to quarter-sized black or blue-green spots clinging to the poolâs surfaces. Blue-green algae are also chlorine resistant. This algae type forms a layered structure where the first layer can be killed by chlorine, but the bottom layers are protected.