Why is my FC so high?

[debbritt]

Tested yesterday:

Salt - 3360
CYA - 80
FC - 15-16
pH - 7
TA - 40
CH - 250-300 (not 100% sure on exact)

I run the SWG every day for about 6-7 hours now that the temps are in the 80s+. Chlorinator is typically running 1-2 hours less than the pump. I'm getting some light green spots on the sides seems like every 3-4 days or so. Is the high FC causing more issues than a lower FC? From last year's notes, I believe the FC should ideally be between 4 and 6, and I had no issues with balancing last year. Should I stop using the chlorinator for a while until FC drops?

 

[Bperry]

Tested yesterday:

Salt - 3360
CYA - 80
FC - 15-16
pH - 7
TA - 40
CH - 250-300 (not 100% sure on exact)

I run the SWG every day for about 6-7 hours now that the temps are in the 80s+. Chlorinator is typically running 1-2 hours less than the pump. I'm getting some light green spots on the sides seems like every 3-4 days or so. Is the high FC causing more issues than a lower FC? From last year's notes, I believe the FC should ideally be between 4 and 6, and I had no issues with balancing last year. Should I stop using the chlorinator for a while until FC drops?

How are you testing the FC? The taylor test doesnt give a 15-16 range. If your CYA really is 80ppm, then FC of 4 is your bare minimum and you should really be running at least 6.

 

[debbritt]

How are you testing the FC? The taylor test doesnt give a 15-16 range. If your CYA really is 80ppm, then FC of 4 is your bare minimum and you should really be running at least 6.

Taylor FAS-DPD Chlorine Test Kit (K-1515-A). I use the 10 mL sample, where each 1 drop = 0.5 ppm (so every 2 drops = 1 ppm). I just tested it again, and it took 35 drops to change the pink to clear.

 

[Bperry]

Taylor FAS-DPD Chlorine Test Kit (K-1515-A). I use the 10 mL sample, where each 1 drop = 0.5 ppm (so every 2 drops = 1 ppm). I just tested it again, and it took 35 drops to change the pink to clear.

So 35/2= 17.5ppm. The test ls are pretty exact so just report the actual results, no need for ranges.

Theres no need for that mych chlorine but its fine to swim with it all the way up to SLAM level (31ppm). But you are better off running a standard level of ~6ppm. Just turn the generation down or turn it off.

But if the watwr is green, you went too low on chlorine and need to SLAM. Once thats done, consider not letting it get low.

As it gets warmer, you may need to turn it up again.

 

[debbritt]

So 35/2= 17.5ppm. The test ls are pretty exact so just report the actual results, no need for ranges.

Theres no need for that mych chlorine but its fine to swim with it all the way up to SLAM level (31ppm). But you are better off running a standard level of ~6ppm. Just turn the generation down or turn it off.

But if the watwr is green, you went too low on chlorine and need to SLAM. Once thats done, consider not letting it get low.

As it gets warmer, you may need to turn it up again.

Perfect, thank you! Should I increase the TA at all?

 

[Bperry]

Perfect, thank you! Should I increase the TA at all?

Might be best to get it to 50ppm. If the pH get any lower then for sure bump it up a bit.