Testing FC w SWCG on?

[Pauls234]

Working to get my new SWCG dialed in and it occurred to me that maybe I should be making more of an explicit effort to test with SWCG off?

When I pull the water for a sample I do always take it from opposite side of return and about 18" depth. If unit is generating could that materially skew my results up? Or I'm far enough away and amount generated at any given moment is minimal enough?

Past week I've been running my RJ 60+ 8am-6pm at 60% and FC has consistently tested 6-7.

CYA is 50, which I know is lower than recommended, but I've been reading this forum for a decade and using LC so I am bumping against a major mental block to go much higher! I did add enough to up it by about 15 yesterday.....

Edited to add: Just noticed happy 10 year (11th TFP swim season) TFP anniversary to me to the day! I'll celebrate with a donation.

Thx
Paul

 

[mknauss]

Most important is testing at the same time each day.
Taking the sample away from a return is a good idea.

 

[Rancho Cost-a-Lotta]

Past week I've been running my RJ 60+ 8am-6pm at 60% and FC has consistently tested 6-7.

That's about 4.5 ppm of FC per day. With swimmers and full sun, sounds about right.

 

[Pauls234]

Thanks for the feedback.

4.5/day definitely reasonable but seems a bit on the high end. Pool does get A LOT of sun, but bather load is pretty light during the week with some days no swimmers or maybe just me (after a 6 mile run) or 2 kids for an hour or so. We do, however have 2 ducks that have made this their home and they aren't always courteous with where they poop.

So, sounds like testing with SWCG on is fine with proper precautions, but will try to avoid.

I'm going to bring CYA up to 70 and see if that reduces some daily loss.

 

[Rancho Cost-a-Lotta]

The calculation also assumes that the unit is producing per manufacturer's claims.