Hayward vs TFP level recommendations

[gsrel]

I've been meaning to ask this question for quite awhile but never had a chance.

On my Hayward ProLogic panel it lists the following:

Chlorine (FC) : 1-3ppm
PH: 7.2-7.5
Total Alkalinity (TA): 80-120ppm
Stabilizer (CYA): 20-30ppm
Calcium (CH): 125-250ppm
Salt: 2700-3400ppm


On TFP it lists the following for SWG on Vinyl pool

Chlorine (FC): 3-5ppm
PH: 7.2-7.8
Total Alkalinity (TA): 60-80ppm
Stabilizer (CYA): 70-80ppm
Calcium (CH) 0-300ppm

So far I've been following the TFP listing but I'm wondering why the big differences between both recommendations

 

[ajw22]

Hayward has not updated their chemistry recommendations in decades.

TFP recognizes the advancements in pool chemistry understanding the CYA and FC interactions.