I've been pondering something, and was wondering the answer:
Lets say I have two identical pools,
Pool "A" has FC=4, CYA=40
Pool "B" has FC=8, CYA=70
I'm referring to ideal levels, listed on the FC/CYA chart here http://www.troublefreepool.com/pool-...ya_chart_shock
Question: Will it require more chlorine to maintain Pool "B" at 8 FC, than maintain Pool "A" at 3 FC? I guess the real question is does chlorine leak out of a pool faster at higher levels?