Not much of a difference. But, why is the recommended levels a little different from each other. Example for Plaster with Bleach.
TFP (TFP website)
PH 7.5-7.8
CH 250-350
TA 70-90+
CYA 30-50
TFTestKits (card w/TF100 kit)
PH 7.2-7.8
CH 250-400
TA 60-90
CYA 40-50
Just asking

TFP (TFP website)
PH 7.5-7.8
CH 250-350
TA 70-90+
CYA 30-50
TFTestKits (card w/TF100 kit)
PH 7.2-7.8
CH 250-400
TA 60-90
CYA 40-50
Just asking