Early on you questioned the SWCG keeping up. The setting on it, of course, is a percentage of run time in a 24hr period. The other factor is pump run time. So if you only run the pump 12 hrs per day, that is the same as running the SWCG at 50%. If the pump is 12 hrs, and the SWCG is 50%, that's 50% times 50% or the same as running the SWCG at 25% for 24 hrs. Pump speed doesn't matter, as long as it is fast enough to allow the SWCG operate at all (may not be slowest possible, but pretty slow). So you have a couple of different ways to manage Cl production. The pump speed can be set depending on your other equipment, and how well skimmers, etc. are doing their jobs. Many of us run at the minimum to keep the Cl generating 24/7, keeping energy costs way down. I boost mine up for a couple of hours in the morning to get any floating overnight stuff cleared quickly, then have it fall to minimums for the remaining 20 hrs. But to the SWCG, it all is the same - pump running for 24 hrs.