Hot tub chemistry calculator
PROBromine or dichlor dose for a spa.
Inputs
Result
Dichlor
0.04 oz
Sodium bromide
0.04 oz
The formula
Dichlor oz = (gal/10k) × 0.23 × ppm. Bromine similar (× 0.25).
Worked example
400 gal × 4 ppm dichlor = 0.04 oz (~1 gram).
Frequently asked
›Bromine vs chlorine?
Bromine handles hot water better and irritates less.