I have a 28,000 gallon pool and my pump is 1hp. Works fine.
about 1 gallon at a dose rate of 5 parts per million, dah
You can use Metal Free from Natural Chemistry32oz. for a 20000 gallon pool.
A 1 HP SHOULD DO FINE, But if you've GOT SOLAR, a 1.5 HP.
It depends upon the average depth of the pool.
You can fill a standard in-ground swimming pool.
find the volume of the pool find the volume of one gallon in whatever unit you are using. divide pool volume by gallon volume
It will take from days to weeks to have that much algaecide displaced. You should not use the pool during that time. NEXT TIME READ THE INSTRUCTIONS ON THE PRODUCTS THAT YOU USE BEFORE YOU USE IT. I would also watch out for any side effects from the copious amounts of algaecide used.
LxW
20000
A 9000 gallon pool {;-). A small above ground pool.
one and a half horsepower.
About 300 gallon.