315 gal hot tub
Tested with Taylor K-1004 test kit.
TA 60 ppm
CH 150 ppm
Borate 40 ppm (based on the Gentle Spa label recommended amount)
Sodium Bromide 30ppm (based on the label's recommended amount)
I added 2 oz sodium hypochlorite (10%) around 3:00pm.
Evening test strips showed both chlorine and bromine in the 5-10ppm range.
By 7:00am the next morning, no chlorine or bromine reading.
QUESTION: How do you calculate the amount of chlorine to add for the 2-step bromine system to keep the bromine level above 2-3 at all times?
Establish a bromine bank, add chlorine daily, target 3-5ppm bromine.
QUESTION: What bromine range through out the day should be expected for the 2-step system?