Usually it is a case of "the more
the better." One LPD-Chlor tablet will neutralize 16,000 gallons
of water at Cl2 = 1 ppm, but to achieve this, it must be
completely dissolved and thoroughly mixed. In a flowing
situation, the rate at which a tablet will dissolve depends upon
the rate at which water is flowing over it.
The capacity to neutralize depends on how much water flows per
tablet. In practice, one should channel the water so that the
stream flows over the full width of the Dechlormat. If the
stream is more than a few inches thick, a second Dechlormat
should be put in series with the first mat.
If possible, collect
and test a sample 20 or 30 feet down stream of the mats. This
will demonstrate if more tablets/mats are required. When the
tablets reach half their original size, new tablets should be