Mine takes 2 days Of 100% run time to reach target FC range. At a cost of 7 cents an hour plate depreciation it comes to $3.36, which is less than one gallon of liquid. I got my SWG so I didn’t ever have to buy/lug jugs. It might take a bit longer, but it will catch up everytime at a savings over liquid chlorine.You still need liquid to get the chlorine level up and then let the SWCG take over from there.
Anybody who is properly oversized should have no problems making enough FC providing it isn’t the hottest part of the season.