A solar pool cover is a great way to keep your pool warm and protect it from debris, but it can also accelerate algae growth. To prevent this from happening, it is important to change the conditions of the pool and use a winter pool cover made of solid woven vinyl. This type of cover will prevent organic matter and rainwater from entering the pool, as well as block the sunlight that algae need to flourish. Additionally, you can keep a pool covered with a black or very dark cover or canvas to stop algae from receiving light.
Pool Shock is the best way to kill pool algae, but you should not use your sun cover after shocking the pool. Wait until chlorine levels drop and then clean the sun cover of any debris or leaves. You can also add an algae hungry chemical and run the pool filter for 12 to 24 hours. This will help eliminate phosphates and starve the algae.
If you notice green dirt in the dark corner, yellow or brown spots around pool stairs, or black sand-like sticks on pool floors, it is time to shake your pool and add algaecide. You can also cut the solar cover 3 to 5 cm over the edges of the pool to the tiles with household scissors.
Finally, apply a pool water clarifier so that they are large enough to filter or vacuum them. Avoid using bleach that you use to clean floors or clothing before placing them in the pool, as it could damage the pool cover or void the warranty. On the one hand, if you keep the cover clean during the time the pool is closed or simply not in use, opening it again next season will be much less of a hassle.