Enough to get a complete turn over of pool water. Knowing your size/kind of pump would give you an idea of about how many gpm it pumps. Then just add a some time to make sure.
Take a look at How To Determine Pump Runtime in Pool School. You can start with something around 6 to 8 hours as a guess of your turnover time, and then adjust things based on how the water looks.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!