This could be pollen depending on the time of year.
turn the water yellow
5284.62 gallons
70
18,000
5300 Gal
Shock treatment for the green part. If it is still cloudy you can add a clarifier sold at your local pool supply.
'bout 1500 to 2000
6015.77 gallons
There is NO way to calculate this without knowing how deep the pool is filled!
If 20' is the circumference, then the answer is 833.4 gallons.
Pool shops have all kinds of cleaner to deal with these types of problems withou upsetting the waters chemical balance.
Hum, just what are you gonna use to color vinyl either under water or out of water???? NO.