CYA Question

[dschribs]

My CYA is 45. So do I call it 40 or 50?

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[Texas Splash]

I round numbers like my taxes ... 45-49 would be 50.

 

[RobbieH]

Why not call it 45?

 

[dschribs]

Im going by the cya/chlorine chat. There is no 45.

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[pooldv]

Always round CYA up to the next 10.

 

[Donldson]

Always round CYA up to the next 10.

^^This. The minimum numbers really are the lowest most people can maintain to avoid a problem. Meanwhile SLAM is a fairly conservative upper end. So there is really zero harm in rounding up your CYA number, but if you round down you could risk dropping too low. I suggest always rounding up the CYA number, even if it is nearly to the next line.

 

[dschribs]

Up it is. Or just add a bit more stabilizer to get to 50 i guess...

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[Texas Splash]

Yeah, plus with the CYA's +/- 15 ppm variance, we know CYA testing one of the trickiest, so I always find it best to err on the high side to ensure I have enough FC in the water.