are two kinds of stains commonly found in pools: organic stains and mineral
stains. Organic stains are stains caused
by something in nature. Most people get
organic stains from leaves falling in their pool over the winter. The leaves then sit on the bottom of the pool
all winter and the pigment from the leaves is then left behind on the liner or
pool finish. Each kind of stain removal
is very unique.
To remove stains in the
organic category, you would use a stain remover such as Biodex Aquadex 50 Stain
off. Simply pour this product into the
water and watch it gently lift any organic stain. Another method of organic stain removal would
be to use Biodex Quick ‘N Thick or another type of surface cleaner. Surface cleaners require some
brushing/scrubbing, and can be very effective.
For non-organic stains, or mineral stains we would recommend a different
method. Mineral stains are stains caused
by metal in the water. Common metals in
pool water are copper and iron. Copper
is the most common. People tend to get
copper in their pool from the deterioration of their pool heater coils. If their pH is not in range, the water begins
to corrode the coils, thus putting metals into the water. The stains left behind from metals are
generally yellow or rust colored. To
remove these stains we recommend two methods.
The first step of stain removal is to ensure that your pool has less
than 1 ppm of total chlorine. This will
help to ensure that we do not oxidize the mineral stains. Secondly, we recommend adding ascorbic acid
to the pool. Ascorbic acid will lift the
stains. We then recommend a sequestrate
(Biodex Protect All Supreme) to ensure that the metals do not come back and
stain the pool again. Lastly, and very
important; leave the pool below 1 ppm chlorine for 10 days.
You can see that there are several methods
for treating stains, any of which an expert at Swim Things can help you with!