Run the pump and filter for 24 hours - Running your filter will help filter out tiny particles that are also to blame for your green swimming pool. Due to the fact that your pool will be running 24 hour, your filter will become clogged quickly. You will need to backwash your sand or d.e. filter whenever the pressure increases 8-10 psi above the normal reading. For example, if my pool normally reads 12 psi (when it's clean), I would backwash when the gauge reaches 20-22 psi.
Remove any large debris and leaves - Using an aluminum leaf rake or leaf bagger attached to a telescopic pole, remove the larger debris found on the bottom of your swimming pool. The large debris needs to be taken out first to ensure that you will not clog your pool cleaner, skimmer, main drain, filter, or piping.
Balance your chemical levels- A balanced water chemistry is essential if you want to get the pool clear.
CLICK HERE FOR MORE ON ADJUSTING CHEMICALS How To Maintain A Swimming Pool Part 3 (Adjusting Chemicals)
Brush down the surface of the pool- Have you ever touched algae? Algae usually has a slimy coat. That slimy coat protects it. Brushing helps remove that protective coat and expose it to the chemicals in the water. Brushing down the walls will help remove some of the algae that is growing on its surface. Any algae that remains will be killed when the pool is shocked.