Cya levels for SWG??

[Windylou]

I have an Intex Ultra Frame with Hayward power flo lx 1 hp pump & sand filter with Hayward T cell 5 salt cell. Just opened the pool & started SLAM. I didn’t close properly last year, so it was a hot green mess. My question is, what’s the reason behind the CYA having to be so much higher on SLAM for salt pools? I haven’t even turned my salt cell on this year yet. I suppose I’m trying to keep it a little lower so that it won’t use as much chlorine since it’s a little harder to find right now. The idea in my head is that salt is irrelevant in a SLAM, so I don’t understand why it has to be higher. I am sure there’s reasoning behind it, so drown me in your knowledge ?

 

[Saturn94]

For a SLAM, CYA doesn’t need to be higher for a salt pool vs non-salt pool. Salt is irrelevant in this case. The recommended CYA level for a SLAM is 30ppm. After the SLAM is finished, then raise CYA to the appropriate level for your salt pool.

 

[Windylou]

Ok, that was my understanding, but the SLAM post in pool school lists SWG differently, so I wanted to be sure I wasn’t missing something. Thanks a ton!

 

[Saturn94]

Ok, that was my understanding, but the SLAM post in pool school lists SWG differently, so I wanted to be sure I wasn’t missing something. Thanks a ton!

I can see what you mean. The chart is just saying what the SLAM level is for a given CYA level. So if your CYA was already at normal CYA levels for a SWCG pool, then you would need to use the appropriate higher SLAM level.

I hope this post makes sense.