dumb chlorine question

[tltmom]

hi, question on the pool calculator:
I am bringing my CYA up from 45 to 60. When I put 60 in the PC I get that the minimum FC =3, but then the next 2 boxes give a range of 5 (min) and 9 (max). Which numbers should I be aiming for?
thanks

 

[tltmom]

oops, just found the answer.
with a SWG, I aim for the 1st number (3) the 5-9 is for pools with no SWG, correct?
thanks!

 

[Optica]

correct

For a pool size of 30K gallons and CYA of 60:
it recommends total FC goal of 3-9 to maintain sanitation. For SWG (salt water chlorine generators) it recommends a FC of 3 but it also shows the normal min, max chlorine levels for non salt pool of FC 5 and 9.

SWG's usually run on the lower end of the recommended range. You want to hit FC of 3

 

[Butterfly]

For SWG w/60 CYA: Min 3, Target 4

pool-school/chlorine_cya_chart_shock

Don't drop below 3 FC.