Unusual Test Results - No CYA?

New2water

LifeTime Supporter
Jun 28, 2011
78
Stockton, CA
Tested the pool for the first time this season using the new chemicals refill kit. Something is not right because I haven't seen this kind of results previously.

pH: 8.2+
T/A: 200
FC: 0
CC: 0
CYA: 0

I'm wondering if the refill kit is problematic or is it the few rains we had in this part of parched California a few months ago.
The pool calculator suggests adding 270 Oz Liquid Chlorine, 60 Oz Muriatic Acid and 80 Oz Stabilizer. Do that seem the right way to go?
 

Mr Bruce

TFP Guide
Mar 24, 2014
2,444
Greenville, SC
It's possible the CYA went away without the rain. Mine was gone, it's been suggested that it turned to ammonia and then to nitrogen (I think).

Are you intending to SLAM or jumping into maintenance mode?
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
You should do the ammonia test ...
Add 10ppm of FC with bleach, then test the FC and CC after 10-15 minutes.
Post back.
 

Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
4,588
NW Ohio
You should do the ammonia test ...
Add 10ppm of FC with bleach, then test the FC and CC after 10-15 minutes.
Post back.
+1 to this, your results match what an ammonia conversion would look like. Don't add any stabilizer until you either rule out ammonia or find and remove it.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Since this is your first time opening and there may be a concern for ammonia in the water, please do the following:
*** (FIRST) - Lower pH to 7.2-7.5. Test about 15 minutes after adding acid with pump running to ensure you have reached your target or repeat as necessary)***
1. Begin a SLAM and dose FC up to SLAM level. If your CYA test is showing as zero (perhaps already converted to ammonia), use a SLAM/Shock FC of 10. Do not add additional CYA at this point.
2. Retest FC at 10-minute intervals.
a. If FC loss is greater than 50%, add FC to bring back up to SLAM level and continue retesting FC @ 10-minute intervals.
b. IF FC loss is 50% or less, add FC to bring back up to SLAM level. Go to Step 3.
3. If CYA is below 30 ppm, add enough CYA to bring level up to 30 ppm.
4. Continue SLAM as directed in the SLAM article until the SLAM Criteria of Done are met. Test as directed in the SLAM article - no longer need to test FC at 10 minute increments at this point.

If there is ammonia, the FC every 10-min will take care of it. If there's not, you'll soon finish this and be on your way to a regular "SLAM" (link below) to ensure the water is free from organics.