I know my title is a bit confusing but here's what I'm trying to ask. When I run my SWG at 20% my FC drops to 4-5 and stays there, which I understand is on the lower side. If I run it at the next setting, 40% then FC jumps to 6.5-7 which is then a little high. I wish there was a 30% setting but there isn't. Do any of you have a recommendation on how to find that perfect setting so your FC stays right near where you want it? Do I run it all day at 40% and shut it off at night? LOL I never turn my pumps off, by the way. That always stays on. Thanks in advance for any tips.