Post-First SLAM - First numbers posted

[familytr33]

Hi All,

Thanks so much for all the info here. In addition to a bunch of pool-related 'wins', you have boosted our confidence to use common household products instead of the expensive pool items.

Will be signing up as supporters for sure!

Following draining of the pool by 2ft for lamp replacement in April, and stopping circulation for 5 days during that period (see another thread), we ended up with a murky mess. We'd already spent $200 at the pool store earlier this year.

After refilling the pool I SLAMmed by adding liquid bleach. At one point free chlorine was 28 ppm.

After lots of filtration, the pool now looks awesome and sparkly, probably its best ever in 10 years of ownership.

My numbers are

FC: 24
CC: 0
pH: 7.6
TA: 90
CH: 250
CYA: 75


My SWG shows 3600, but I do not have a salt test kit yet to verify.

Please can you consider my questions...


1. FC has actually increased from 20 - 24 over the last 2 days without me adding any bleach, and the water has been very clear. Should I turn off my SWG until the Cl drift down to around 3 ? Is the pool OK to swim in with the high chlorine level?

2. I think I need to increase calcium hardness. Do you agree?

3. Should I work to get the pH down or will it drift down now the SLAM is over.


Any other comments appreciated

Thanks again,

ft.

 

[Mr Bruce]

1. For a CYA of 80 in a SWG pool, the target is 6 and the minimum is 4. Pool School - Chlorine / CYA Chart

2. Yes. I would target 350ish.

3. That's a good pH for you. With a SWG your pH will drift up, so you should add acid to lower it when it gets above 7.8 Pool School - Water Balance for SWGs

 

[pabeader]

We usually say, that as long as you are at or below the SLaM level of FC for you CYA, you are okay to swim. For your CYA of 80 the shock level is 31 according the chart in pool school.

 

[cowboycasey]

go ahead and shut your SWG off until you get down to FC of 6 and turn it back on, try to keep your FC at 6, if it drops to 5 add run time if it raises to 7 less run time...

Great job on having a sparkly pool

 

[YippeeSkippy]

Don't bother testing pH while your FC is that high. The test isn't accurate then.

Could you please specify the state you're in as many questions and answers require us to know your climate. THanks!

 

[familytr33]

Don't bother testing pH while your FC is that high. The test isn't accurate then.

Could you please specify the state you're in as many questions and answers require us to know your climate. THanks!

I am geographically very close to your location.

 

[YippeeSkippy]

I am geographically very close to your location.

I'll try to remember that when answering, but others might not have such good memory Your state helps us tailor answers to your climate. It really helps us a lot. Thanks