5 | P a g e
Granular Chlorine
Also referred to as Dry Chlorine, Cal Hypo. Its chemical
name is Calcium Hypochlorite.
As its name suggests it is a Calcium Based product.
There are several grades so the buyer should be aware.
Available chlorine is the key.
Today many suppliers including Pool Pro here in Australia
use the highest quality which is 70% available chlorine.
Simply this means that 70% of the product is chlorine and
30% is residue.
Generally speaking the larger the granule the less quality
the product, so you want to buy a fine granule product.
Granular chlorine must be dissolved in water before being
added to the pool. Once dissolved, the residue will be at
the bottom of the bucket. The liquid is added to the pool
and the residue discarded.
Granular chlorine is not suitable for SALT POOLS. Why?
Because it is calcium based the calcium can build up on
the chlorinator cell and shorten its life.
When purchasing look at the label, the active constituent
will say 'Calcium Hypochlorite'
