To calculate how much water will need to be removed from a pool, with too much
salt, follow the formula provided below (Proportional Method):
Salt Dilution Formula
39
Part I
(Ave. Pool Depth” X 3200)
Actual Salt level in Pool
Part 1:
Take the average depth of the pool in inches and multiply that by
3200
(or desired salt level within 1500-4500ppm)
.
Then divide that
number by the actual salt level in the pool (based on independent test).
Part 2:
Subtract the Average Pool Depth by the answer from
part 1
. This
will give you the total number of inches to drain and replenish with fresh
water to achieve a salt level of
to match desired salt level from step 1.
Part II
Ave. Pool Depth - Answer from Part 1 = Amount of Water to Drain
Example: a pool has an ave. depth of 54” and the salt level is 4500ppm
54 X 3200 = 172800
4500
38.4
Example: Part I
54 – 38.4 =
15.6”
Example: Part II
Note: It is recommended to reduce the water level no more than six inches at a time before
replenishing with fresh water. Failure to due so may result in damage to the pool structure or
surface.
