CYA won't increase in sw pool

[Whynotme]

Hi all, I'm having an issue getting my CYA to increase. 9k gallon swg Kayak pool, 12x24. Using Taylor K2005 test kit. FC is 3.5, TC is 3.5, pH 7.6. alkalinity 120, calcium hardness 200, CYA 30. I added 112 ounces liquid stabilizer 3 days ago (when CYA was too low to even register on Taylor black dot test-Leslies test showed 18) and FC/TC was 5. My CYA went from 18 to 30 after adding stabilizer. Based on TFP's chart for saltwater I'd like to keep CYA around 60-70 and FC at 5. Do I just keep adding more stabilizer and testing after 24 hours with pump running? Leslie's told me 113 ounces would raise my from 18 to 60, but it hasn't. They are stumped and wanted to sell me another 128 ounces of stabilizer. I've turned up the swg to 40% as it was set to 25% so I can raise the FC a little, but I'm nervous about adding more stabilizer and overshooting the mark. I'm not in a position to drain and refill as I'm on a well and don't want to put that runtime on my well pump. Advice?

 

[reggiehammond]

I doubt you need your CYA that high given your location; but CYA can be slow to register on CYA testing.

Dry, granular CYA is a much better choice as you can weigh the amount and be certain it enters the pool via the sock method.

 

[Newdude]

I added 112 ounces liquid stabilizer 3 days ago

There's likely your problem. The goods clump on the bottom and you pour mostly water when not using a full jug. Only then can you swish the snot out of it to get it all.

Use the rest of the bottle and rinse it well. 1 gallon is 41 CYA for you and fine starting at 30.

We don't put a lick of faith in leslies testing or advice.

 

[Whynotme]

I doubt you need your CYA that high given your location; but CYA can be slow to register on CYA testing.

Dry, granular CYA is a much better choice as you can weigh the amount and be certain it enters the pool via the sock method.

I wasn't aware location had bearing on situation. I'm just going by the TFP chart for saltwater.

 

[Newdude]

I wasn't aware location had bearing on situation.

Unlike the one size fits all industry, we've fine tuned the recommendations for location, climate and fill water.

For example, someone in the Midwest has a different experience with sky high TA than they do in the desert with sky high CH. On the east coast, we get so much rain that CYA and CH usually drop so we can start a little high to prolong the next dose. Out west they aim lower for CH to start as it'll rise from the copious evaporation and high CH fill water replacing it.

The further north you go the less CYA you need to combat the friendlier UV. The further south you go, the harsher the UV becomes and they can need +20 or even +30 CYA over the usual recs.

 

[Whynotme]

Unlike the one size fits all industry, we've fine tuned the recommendations for location, climate and fill water.

For example, someone in the Midwest has a different experience with sky high TA than they do in the desert with sky high CH. On the east coast, we get so much rain that CYA and CH usually drop so we can start a little high to prolong the next dose. Out west they aim lower for CH to start as it'll rise from the copious evaporation and high CH fill water replacing it.

The further north you go the less CYA you need to combat the friendlier UV. The further south you go, the harsher the UV becomes and they can need +20 or even +30 CYA over the usual recs.

Makes sense, thank you.