If the pool has been shocked and is no longer green but turns green again after a day or two check the water chemistry and pay particular attention to phosphates in the water.
Clean green swimming pool water.
Then add sodium bicarbonate to increase the ph or sodium bisulfate to decrease it.
Shock the green pool.
You can drain all the water but unless it s too green and borderline black there is no need to drain all the water.
Next clear any floating debris and scrub the sides and bottom of the pool with a pool brush.
Start off by adding 3 or 4 gallons and if you see no results overnight add 3 or 4 more gallons the next day.
You can however try to clear the green pool water first before choosing the nuclear option.
This can be done by shocking your pool with high levels of chlorine.
If your pool is dark green bordering on a blackish color it may be more effective to drain the pool completely and acid wash the surface.
Test the ph levels.
After shocking the pool filtration becomes a key factor in clearing up a pool.
You can check your filters here too and clean them up for the next step if you wish.
Method shock level and maintain.
The green water is probably algae which is unhealthy.
You can test the sanitizer level too but facing facts we already know that s too low which is why you have green water in the first place.
Clean the filter often during this process.
Other than that you can shock the pool to clean it.
Rob at dengarden says if you can see at least six to eight inches below the surface of the water most likely the pool can be treated chemically.
If your pool is very dirty it may need many gallons of liquid chlorine shock over a period of days before the water clears.
To get rid of green water from a pool start by using a chemical test kit to test the chlorine and ph levels.
You don t even want to think about a child falling into the murky water and not able to be seen.
The only way to clean a green pool fast is to kill the algae that have bloomed in the water.
If even after knowing why your pool water turned green your swimming pool has become an abode for algae and bacteria time to clean it.
The experts at trouble free pool coined the s l a m.
Continue this process until you notice the water changing color to either cloudy white light green or clear.