brown buildup or stain on fiberglass steps

Stains on the pool surfaces, pool equipment
or on the swimmers, or off-color swimming pool
water. Discolored but clear pool water.

brown buildup or stain on fiberglass steps

Postby Daisy » Mon 01 May, 2006 17:17


Opening up our pool this spring we have a brown stain or buildup on fiberglass steps and plastic parts like jets and skimmer parts. Otherwise, the pool cleaned up beautifully. A sample of the pool water was taken in for testing and found to be in pretty good shape. How do I clean the brown off?



brown stains on pool

Postby trudy » Mon 01 May, 2006 17:57

try brushing after you shock the pool. may be stains from metals in which case its harder to treat. can also be from tannins in leaves that have sat all winter in the pool. more info??

brown stains

Postby jw » Sun 16 Jul, 2006 01:26

If the stains are from iron, you can clean them up by rubbing a Vitamin C tablet on them.

brown buildup or stain on fiberglass steps

Postby lschrimsher » Fri 04 Apr, 2014 15:18

What if the step is below the water? Only our top step is brown, it was not covered.
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Re: brown buildup or stain on fiberglass steps

Postby paulbest » Sun 07 Aug, 2016 04:36

A fiberglass swimming pool is relatively easy to keep clean. regular testing can help you maintain the finest water balance. It is important to have a pH balance below 7.2 to keep the water from stinging as you swim in it. The total alkalinity needs to be below 80 parts per million. Maintain your chlorine at or below 1 ppm and the calcium hardness at 200 to 400 ppm. If any of these numbers get out of its ideal range, stains can develop. When these happens, simply add the right chemicals to remove the stains.

1.Remove oily stains from the water line with non-abrasive household tile cleaner applied with a soft cloth or sponge. Suntan lotions and other personal products worn by swimmers cause these stains. You can get rid of them much the way you remove the ring in a bathtub.

2.Eliminate brown stains caused by iron by scrubbing the area with a chlorine tablet. If you cannot easily reach the spot to scrub it, duct tape the tablet to the end of a telescoping pole. Don’t rub too hard or you can damage the fiberglass surface.

3.Take off turquoise-colored stains caused by copper by scrubbing them with tile cleaner. After cleaning, treat the water with chelating or sequestering pool chemicals designed to remove copper stains. Follow the chemical manufacturer's directions for specific amounts to add based on the size of your pool. These products cause the copper remaining in the pool to clump together so you can remove it by cleaning or filtering the water.

4. Run the filter system throughout pollen season and while deciduous trees shed their leaves. This keeps the organic matter from settling onto the fiberglass walls and floors of the pool, causing yellowish green stains. Rub a chlorine tablet on any stains you cannot wipe off with a sponge.

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