Turn off SWG when shock pool?

Daisy08 · Jul 18, 2019

Hi all

I am trying to figure out if I should turn off SWG when shocking my pool. Pool was fine and balanced but we had a big rainstorm last night and it's been VERY hot so I shocked this morning. My question is, if I run the filter for 24 hours, should I turn my SWG off for 24 hours as well? In my mind, it seems redundant to do both. Like I said, I just shocked to clean after a storm- I am not having issues.
My chlorine level is at a 7 now- nothing too high. Guidelines for shocking and use of the SWG would be appreciated!

Msch99 · Jul 18, 2019

I am not an expert, but am curious as to why you raised CL level because it was hot out? If your CL level stays in sync with your cya level, you shouldn't have any problems with algae because of temperature. If you are worried, perform an oclt. Check out pool school for details.

Daisy08 · Jul 18, 2019

Well, we mostly shocked bc of the rain. This might be a dumb question but shouldn't you shock 1x week anyway?

mknauss · Jul 18, 2019

TFPC does not 'shock" a pool. There is no need to do a weekly 'shock' if you follow the FC/CYA Levels

Your SWCG adds chlorine when it is on. If your pool needs chlorine, leave it on. If you are going to follow the SLAM Process, we normally say turn it off as you need to add much larger quantities of chlorine more often that what a SWCG can produce.

Daisy08 · Jul 18, 2019

Ok so point in shocking if all is well? Revolutionary!

Thanks--

IceShadow · Jul 18, 2019

Basically, the way most of the pool industry works is throwing floating pucks in the pool to trickle in chlorine in an unmeasured way, then super-chlorinating the pool once a week or so. Algae is probably starting to build up over the week, but the super-chlorination kills it off. This is kinda wasteful, potentially harmful to pool equipment and surfaces, and since the pucks and some shock adds CYA, eventually gets CYA levels to a point where the pool has to be drained for chlorine to work on it at all. Instead, here, we advocate keeping CYA at a certain level, then adding liquid chlorine daily to keep it at a certain level range that is based on the CYA level. Then your pool stays clear and you never need to "shock" it.

AUSpool · Jul 19, 2019

Daisy08 said:
Ok so point in shocking if all is well? Revolutionary! Thanks--

No, no there’s need to shock on a regular basis as the pool shops would have you believe. It’s not really revolutionary, just good science, and will save you money. The best course of action after a storm is to check your equipment, get all the debris out, check your FC and adjust as needed with bleach.