Appendix B
Page 6
Redi-Chlor
http://www.redi-chlor.com/
50 tablets in blister packs for $9.95
Calcium Hypochlorite is widely available in tablets or tubs of granules through chemical
supply or swimming pool supply stores.
Formulations/instructions
Redi-Chlor tablets come in different sizes and can be broken in half or fourths to treat
different quantities of water. Recommended dose results in 2-5 mg/l residual chlorine.
Add more for very cold water or if faint chlorine smell not detected after contact time.
Available in blister packs with 50 1/10
th
gram tablets to treat 1 gallon per tablet, or blister
packs of 50 1/4
th
gram tablets to treat 5 gallons per tablet.
Comments
This is a convenient source of hypochlorite, which can also be used for superchlorination
(see text).
Halazone Tablets
Tablets contain a mixture of monochloraminobenzoic and dichloraminobenzoic
acids.{Dychdala, 1991 #64} Each tablet releases 2.3 to 2.5 ppm of titratable
chlorine.{O'Connor, 1970 #138} These tablets have been criticized because the alkaline
buffer necessary to improve halazone dissolution decreases disinfectant efficiency,
requiring unacceptably high concentrations and contact times (6 tablets yield 15 mg/L
with recommended contact time of 60 minutes) for reliable disinfection under all
conditions.{Rogers, 1979 #164} The shelf life is 6 months; potency decreases 50% when
