FC loss question

[paulmaz]

This may be a dumb question, but is the FC loss from 20-18 the same as from 9-7?

 

[JoyfulNoise]

Depend on the CYA level. If the CYA is constant, then no, the FC loss rate is higher at higher FC/CYA ratios.

 

[mas985]

Depends on what you mean by the same. It is the same in that the loss is 2 ppm of chlorine for both cases and you would need to add 2 ppm to get back to the original values.