CYA Remains Unchanged and Salt Increases

[Animal827]

I am trying to figure out a couple of things. I have added 70 ounces of CYA over the past 2 weeks, and it only raised by 10ppm. Over that same period, my salt reading has gone up by 400ppm without adding any Salt. I have tested these numbers several times in the same sample to confirm. EDIT: I checked the SCG and it is stating that I have 3300ppm salt. Maybe the R-0630 or R-0718 is bad? The best by date for R-0718 is 8/24.

Is it possible that my Robelle CYA from Amazon is really just Salt? Why did my Salt increase so much? Could be reagents be bad (definitively before the best by date and no funky colors during testing)?

Unrelated or maybe it is related, my Combined Chlorine has not gown down, and remains constant. Is this SLAM worthy? Any thoughts suggestions, or ideas?

I am going to the pool store cautious to test the water and pick up some liquid chlorine to be prepared and to double check the numbers (I wonder what Leslie's testing will show).

Date	Free Chlorine (FC)	Combined Chlorine (CC)	Total Chlorine (TC)	pH (pH)	Total Alkalinity (TA)	Calcium Hardness (CH)	Cyanuric Acid (CYA)	Salt	Temperature	CSI	Notes
5/31/2024	4.20	0.00	4.20	7.9	80	250	60	3,400	77	-0.060	Set SCG to 40; Backwash; Added 16oz DE; Fixed Flow Rate (O Ring Cap to Pump)
6/1/2024	3.80	0.20	4.00	7.9	80	250	60	3,400	78	-0.060	Set SCG to 45; Pump 24/7 2,600/3-2,200/9-1,800/12; Added 32 ounces of Muriatic Acid
6/2/2024	2.80	0.60	3.40	7.4	70	250	50	3,400	80	-0.580	Set SCG to 50; Brushed walls; Added 48 ounces CYA
6/7/2024	5.60	0.60	6.20	7.7	80	250	60	3,400	79	-0.240	Added 24 ounces CYA
6/14/2024	9.00	0.60	9.60	7.7	80	260	60	3,800	79	-0.240	Air bubbles in pump basket

 

[PoolStored]

Likely reagents. I had unexpired reagents that were showing my salt 200ppm higher. New reagents solved it...

 

[Animal827]

Likely reagents. I had unexpired reagents that were showing my salt 200ppm higher. New reagents solved it...

I agree for the salt increase. I assume you mean the R-0718 Silver Nitrate Reagent.
However, I am still stumped as to the CYA since I just got those reagents refilled this season, and I heard those are the most stable. I will see what the Leslie's return on that front...maybe I'll even buy CYA from them since I almost went through a 7lb of Robelle CYA this season already.

 

[PoolStored]

Dunno on the CYA.
As to the CC, that is entirely normal and I always get .5 CC, so I never test it anymore.
You can also switch your FC testing to a 10mL sample, each drop is .5FC.

 

[Animal827]

Dunno on the CYA.
As to the CC, that is entirely normal and I always get .5 CC, so I never test it anymore.
You can also switch your FC testing to a 10mL sample, each drop is .5FC.

I always thought I had a problem since I would always get a range of .2 to .4 (with an occasional 0 and .6 thrown in). Water always been clear, but i know that is not always telling the whole story. As always, thanks for responding! I'll let you know about the CYA and Leslie's test results...