Back from vacation...CC 3.0!

[CombatLearjetter]

I left our new (to us, 2 year old total) pool alone for the last week and got back to the following results:

FC: 8.5
CC: 3.0
CYA: 75
PH: 8.2
Alkalinity: 100

The CYA and FC are right where I want 'em, and I was able to get the Alkalinity & PH on track with a little MA. What in the world is going on with my CCs though? I'm wondering if I'm testing wrong (using 10 ml sample w/the TF-Pro kit. 6 drops / 0.5 = 3.0). Am I messing up the test, or is it time to SLAM?

 

[cdadams1223]

If you're pretty familiar with your TF-Pro then your probably did it right. Have you done an OCLT to see if you're losing > 1ppm overnight? If you haven't I'd do that tonight for sure. Can you adda signature so that myself and the true pros on this site can help you better? See the following link: Create Your Signature - Further Reading

Also, your CYA cannot be 75. It's based on a logarithmic scale so round up to 80. If you don't think that's right then double check it. How are you chlorinating? Liquid chloring (LC) or a SWG? Is your pool plaster, vinyl, or fiberglass? Make sure all of that is in your signature as well as what kit you're using to test your water.

 

[Newdude]

Hey CLJ and Welcome !!!!

Was the pool covered ?

 

[SoCalTFP]

Hey CLJ and Welcome !!!!

Was the pool covered ?

This. I haven’t seen CC that high in my green pool prior to SLAMing. Throw a cover on there and I get 0.5 CC overnight.

Water looks good? I’m assuming your SWG with that long away and 8.5 FC so it was probably well above minimum.

Or did everyone get back from the trip and use it as a public urinal?

 

[Oly]

Maybe a huge pool party at your at your place while away?
Check your recycle can for empties.

 

[Bperry]

I left our new (to us, 2 year old total) pool alone for the last week and got back to the following results:

FC: 8.5
CC: 3.0
CYA: 75
PH: 8.2
Alkalinity: 100

The CYA and FC are right where I want 'em, and I was able to get the Alkalinity & PH on track with a little MA. What in the world is going on with my CCs though? I'm wondering if I'm testing wrong (using 10 ml sample w/the TF-Pro kit. 6 drops / 0.5 = 3.0). Am I messing up the test, or is it time to SLAM?

You didn’t add any non-chlorine shock before you left by any chance? That’ll mess up the CC test.

 

[CombatLearjetter]

If you're pretty familiar with your TF-Pro then your probably did it right. Have you done an OCLT to see if you're losing > 1ppm overnight? If you haven't I'd do that tonight for sure. Can you adda signature so that myself and the true pros on this site can help you better? See the following link: Create Your Signature - Further Reading

Also, your CYA cannot be 75. It's based on a logarithmic scale so round up to 80. If you don't think that's right then double check it. How are you chlorinating? Liquid chloring (LC) or a SWG? Is your pool plaster, vinyl, or fiberglass? Make sure all of that is in your signature as well as what kit you're using to test your water.

Thanks for the response and coaching! A few answers:

• I was guessing between the CYA 70 and 80 lines. That's the most difficult test!
• Signature updated. Importantly for this discussion: Plaster, TF Pro & SWG.
• NOT covered

Now, an update:

• When I tested this morning, the TA & PH were back to 80 and 7.6
• FC increased to 13
• but CC was back to negligible (barely 1 drop to clear test)

My assumptions, based on what I've read thus far: Perhaps sampling the water yesterday before vacuuming, cleaning the skimmers and scrubbing might have thrown off the CC? It's also possible I used the wrong reagent...but I don't think that's the case. Could my high TA/PH contributed as well before I added MA?

Another datapoint: I dialed up the SWG while I was gone but turned it off today since the FC was so high this morning. I'll perform an overnight chlorine loss tonight and in the AM and will report back tomorrow.

Final question for @Bperry : can you point me in the direction of a link or forum on this? I'll be sure to shock before the next extended absence!

 

[Newdude]

FC increased to 13

Wrong emojii. You need this guy.

The daily mission is to have 'enough chlorine' to make it until tomorrow. You passed your mission with flying colors. You also passed tomorrow's mission, and maybe even Saturdays too. Bravo in advance of those.

When you're going to goof, goof on the harmless side that won't gift you a swamp. Step in and dial it down a little if need be, and chuckle at the whoopsie.

Could my high TA/PH contributed as well before I added MA?

Never to CCs.

But here's a thought. Did you move from the FC to the CC test quickly ? If you let the sample sit a bit it goes pink again. That color change doesn't count. I have my bottles ready, in order, uncapped. Then I can move through each step without pausing. I recap/ tidy up after.

 

[Bperry]

Final question for @Bperry : can you point me in the direction of a link or forum on this? I'll be sure to shock before the next extended absence!

Don’t do that! My question was aimed at non-chlorine shock (MPS) being something people use that will cause false high CC readings. Don’t use it!

 

[mgtfp]

Another option is that your test vial or sample bottle was dirty and the CCs created "on the fly".

Could explain why you tested much higher FC just a day later.