Metals and Stains

PROBLEM: Staining appears as discoloration on pool surfaces.  These stains may be green, blue, purple, gray, reddish-brown or beige to brown.

SOLUTION: "Permanent" stains (ones not easily brushed off) are typically the result of some chemical imbalance or metals present in the water.


PROBLEM: Gray, green to bluish purple stains.

SOLUTION: Most likely copper, possibly iron.


PROBLEM: Reddish to yellow-brown stains.

SOLUTION: Iron is the most likely cause.


PROBLEM: Medium to dark brown stains.

SOLUTION: Uncommon, but the presence of manganese is often the cause.


PROBLEM: Beige to tan stains on plastered or marcite finishes.

SOLUTION: This is a calcium or silicate scale build-up.  Although scale is white, dirt is trapped in the crystals as they form.