I've been using the Trouble Free Pool app to manage my chemical balance for my pool. However, the app is giving different recommendations for FC than the pool school article "Water Balance for SWG". That article lists FC should be 4-6 ppm with CYA of 70-80, etc. I have everything but the CYA at the recommended levels and I'm currently adding some right now.
But at my current CYA of 60, pool math app says my target FC is 7 with a range of 3 - 9, and if I enter 70 for the CYA value that raises to 8 with range of 3 - 10 and at 80 it's 9 with a range of 4 - 11.
Which one should I use as 4-6 is a lot different than 4-11 with 9 recommended as target?
But at my current CYA of 60, pool math app says my target FC is 7 with a range of 3 - 9, and if I enter 70 for the CYA value that raises to 8 with range of 3 - 10 and at 80 it's 9 with a range of 4 - 11.
Which one should I use as 4-6 is a lot different than 4-11 with 9 recommended as target?