(10 x pond nitrite concentration) -
(pond chloride concentration) = parts
per million (ppm) of chloride to add
to the pond
The number “10” used in this formula
is the minimum desired
chloride:nitrite ratio number. It is
used here to get a 10 to 1 chloride
to nitrite ratio. If a higher ratio is
desired, substitute the higher
number for the 10.