Winterize chemical kit calculator
PROClosing doses: shock, algaecide, stain-and-scale.
Inputs
Result
Shock (cal-hypo)
4.0 lb
Algaecide (60%)
8.0 oz
Stain & scale
64 oz
The formula
Per 10,000 gal: 2 lb shock, 4 oz algaecide, 32 oz stain & scale.
Worked example
20,000 gal: 4 lb shock, 8 oz algaecide, 64 oz stain & scale.
Frequently asked
›Order matters?
Balance water first, then shock, then algaecide the next day.