Remember that the source water for filling your pool can have certain
properties that can cause chemical changes as you top off your pool; especially
calcium hardness & metals & minerals.
Over 14 gpg
Extremely Hard
10 to 14 gpg
Very Hard
7 to 10 gpg
Hard
3 to 7 gpg
Moderately Hard
less than 3 gpg
Slightly Hard
gpg = "grains per
gallon"
1 gpg ≈ 17 ppm
gpg = grams per gallon
If
your tap water is "soft" or "hard", those chemical make ups, make a
difference. The use of water softeners makes a difference.
PLEASE tell us this information when you contact us so that we can better
help you.