I currently have the circulation pump running for 3 hours daily for general filtration & chlorine generation. The SWG is set at 20%. That seems to stabilize the level of FC quite well. Maybe about once a week the level of FC drops to about 3 (from my target of 4). It seems easy just to add some liquid chlorine. However, is there a reason why I should set the SWG run time above 20% instead?
[BTW, I just wanted to say "thank you" to everyone for their quick & insightful responses to my various questions over the past several months. As a newbie to the pool/spa scene, your help has put me on the fast-track to understanding the basics of water chemistry].
Thank you for your help.