CYA is like "sunscreen" for you FC. You need at least 30. Some people shoot for 40 like me here in Florida.
You can buy it at walmart.
Kim
You can buy it at walmart.
Kim
the pool is 21,000 gals couldn't be any cya so to get it to 30 requires 6.25 lbs Once you put it in consider it to be 30ppm test it again in a week to see for sure then add the rest to get to 40-50 once your slam is completed
CYA is like "sunscreen" for you FC. You need at least 30. Some people shoot for 40 like me here in Florida.
You can buy it at walmart.
Kim
No problem. This will help a lot. Most additions show up on tests right away, but CYA dissolves slowly and even then doesn't really show up fully for a week. So at this point, once you have the stabilizer in the sock (5.5 pounds, right?), you should assume your pool has 30 ppm CYA in it for SLAMming. So you now target 12 ppm of chlorine for your slam.
If you have little FC in the pool, it's a good time to get a pH reading. If you already added the chlorine again, no big deal.
the pool is 21,000 gals couldn't be any cya so to get it to 30 requires 6.25 lbs Once you put it in consider it to be 30ppm test it again in a week to see for sure then add the rest to get to 40-50 once your slam is completed
Woot! Woot! Added CYA and my chlorine held at 12 and 0 CC!!!. thank you! Pool still milky but at least my chlorine is holding!!!!!! Try again in about an hour
:compress:
Looking good!
Can you post a photo of the water ?? Standing at the center of the stairs shooting down into the water works best as the stairs can be used as a reference for distance and clairity.
When you test for OCLT you need to make sure the SWG is OFF.
Once the SLAM is completed and it's been a week since your last stabilizer addition you'll still want to bring that CYA level up to 60 or 70. Before you raise it you just want to make sure you have completed the SLAM and you've killed everything. If you think you'll need to backwash sooner than a week it's best to add the stabilizer and hang the sock in front of a return jet rather than in the skimmer. That way more goes into the pool and less is sitting in the filter which would get flushed out during a backwash.
From Pool School : Cyanuric acid, often called stabilizer or conditioner, both protects FC from sunlight and lowers the effective strength of the FC (by holding some of the FC in reserve). The higher your CYA level, the more FC you need to use to get the same effect. It is important to know your CYA level so you can figure out what FC level to aim for. If you don't have a SWG or problems from extremely high amounts of sunlight, CYA is typically kept between 30 and 50. If you have a SWG or very high levels of direct sunlight, CYA is typically kept between 70 and 80.
You increase CYA by adding cyanuric acid, often sold as stabilizer or conditioner. CYA is available as a solid and as a liquid. The liquid costs a lot more, and generally isn't worth the extra expense. Solid stabilizer can take up to a week to fully register on the test, so don't retest your CYA level for a week after adding some. Solid stabilizer is best added by placing it in a sock in the skimmer basket. The pump should be run for 24 hours after adding solid stabilizer and you should avoid backwashing/cleaning the filter for a week.