Pool Salt Dose
Pool salt to add for a salt-chlorine generator, or the water to replace to lower an over-salted pool.
Example
You enter
- Pool volume (gal) 20000
- Current salt (ppm) 2000
- Target salt (ppm) 3200
You get
- Change +1200 ppm
- Salt (lb) 200.16
- Salt bags 6
Details, formula, and sources
Pool salt to add for a salt-chlorine generator, or the water to replace to lower an over-salted pool, by a straight mass balance. Reported in pounds and 40-lb bags.
Add: salt lb = gallons x 8.34 lb/gal x ppm rise / 1,000,000, bags = ceil(lb / 40); lower: drained fraction = 1 - target/current.
Mass-balance identity (NSPF CPO / ANSI-APSP-ICC, by name); 8.34 lb/gal water.
Cell spec plate and salt-bag label free with the equipment.
Math aid for personal verification. Stop work and consult the qualified person on site if any number does not match the field condition.
Field names used by the API: gallons, current_salt_ppm, target_salt_ppm, delta_ppm, salt_lb, salt_bags
- Target salt band ~3,000-3,500 ppm on the cell spec plate (advisory)salt-cell maker