First Set of Numbers - Kit Just Arrived

daanjo

Member
Jul 12, 2010
5
FC: 5
PH: 7.5
TA: 50
CH: did not check
CYA: I'm a bit confused by the black dot test. Will the dot disappear, or does it just get distorted. It appears my CYA is 10 or lower even after 4 days.

Owned pool for 4 days, and have added (2-5 - 3oz) Shock (hyp-chlor 53%) each night.

I intend to continue with shock to maintain FC levels until my CYA has achieved 40. Is this the correct action?

Thanks,
Darrin

12' x 36" Intex AGP
 

257WbyMag

TFP Expert
LifeTime Supporter
Feb 23, 2008
5,061
Denton, TX
Yes, on the CYA test, once the dot disappears, that is when you take your reading. If the dot doesn't go away completely, you essentially have no CYA.

CYA can be added by itself as stabilizer powder, it can be added by using chlorinating tablets to chlorinate, or it can be added using a product called dichlor. Some products that are sold as "pool shock" are dichlor and this will get your CYA up quickly. It sounds like what you are using (hyp-chlor 53%) is calcium hypochlorite. This will not add CYA to your water.
 

daanjo

Member
Jul 12, 2010
5
I was able to find liquid stabilizer at Lowes. Should I attempt to achieve 40ppm in one dose, or should I build it up gradually over the next few days.

Intex 12' x 36" APG

Thanks
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
CYA needs a week to dissolve before you measure the level again. I would aim for 40 all in one go, wait a week to see where you ended up, and then make any further adjustments that might be required at that point.
 

257WbyMag

TFP Expert
LifeTime Supporter
Feb 23, 2008
5,061
Denton, TX
Since you bought the liquid stabilizer, it will dissolve pretty much immediately. The powdered kind of stabilizer takes upwards of a week to dissolve. Add the liquid stabilizer and check the CYA in an hour.
 

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