- The fastest way to clean a green pool is by using pool chemicals and your pool filter. ...
- Adjust your pH and alkalinity levels in the pool by using Alkalinity Plus and pH and pH minus. ...
- Add an algaecide to your water to remove the rest of the green algae.
How do I get hard algae off the bottom of my pool?
Use a pool brush to vigorously scrub any pool surfaces covered in algae, including the walls, floors, and steps. Apply a green algaecide according to the directions on the label. Let the water circulate for 24 hours, then brush the pool surfaces again. Vacuum or backwash to remove any remaining dead algae.