Brand new pool owner here (installed 2 days ago). I have read a bunch of posts that would tell me how to determine the turnover rate, buy using my Pool Gallons divided by the GPM. I can calculate the pool gallons (24,000) but can't find out what my GPM is. I dont have a flowmeter, so what are my options? I can't seem to find anything in the filter documentation, and the pump has a variable speed setting from 1000 RPM to 3400 RPM. Of course, I have no Idea what it should be set at, or how long it should run.