- How to Remove Bathtub Rings From Fiberglass Pools
- How to Remove the Stains From a Fiberglass Pool
- How to Care for a Fiberglass Pool
- How to Refinish a Fiberglass Swimming Pool Sliding Board
- How to Clean Hard Water Lines on Fiberglass Pools
- How to Remove Algae From Fiberglass
- How to Refinish My Fiberglass Pool
Fiberglass pools have a smooth surface that won't scratch or cut swimmers. They're lower maintenance than other pool types, and require less electricity and fewer chemicals. However, metals in the water, body oils and suntan lotions can cause discoloration at the waterline similar to a bathtub ring. There are a variety of ways to remove bathtub rings from fiberglass pools. Consult your pool manufacturer first for the company's recommendations. If that doesn't work, try one of these other remedies.
Use a commercial product from your pool store like pool tile cleaner, Jack's Magic Blue Stuff or Off the Wall. Or use a non-abrasive tile or vinyl cleaner that's not designed specifically for use in a pool.
Treat the water with oxalic acid. The water may be cloudy for a few days after treatment.
Treat cloudy water by running the pool filter until the water is clear. Then add chlorine. Check the pH balance frequently when you're running the filter, and keep it at 7.2.
Rub the ring with a Mr. Clean Magic Eraser. It won't damage the surface.
Put ascorbic acid in the water. This is available at pool stores and as a product named Leslie's Stain Remover. Use it in combination with a metal reducer like Metal Free. Test to see if this method will work by rubbing a vitamin C pill on a spot of stain.
Rust or Iron Stains
Rub the rust stain with a chlorine tablet.
Brush the stain with a soft-bristled brush until the tablet and rust stain are gone.
Add ascorbic acid powder to the pool filter to remove several rust stains on your fiberglass pool. Follow the directions on the label.
Brown Ring Stains
Add oxalic acid to your pool's water to help eliminate brown ring stains on your pool. Follow the directions on the label.
Rub the brown ring stains with a magic cleaning eraser until the stains are gone.
Clean the area with a sponge saturated in warm, soapy water.
Stains at the Water Line
Apply a mild pool cleaner to a sponge.
Rub stains at the pool’s water line with the sponge.
Scrub stubborn stains with a plastic scrubber.
Wipe stains away with a damp cloth.
Fiberglass pools are almost 20 times stronger than concrete pools and are manufactured in one large shell. Their strength and composite materials mean they are resistant to temperature changes such as extreme heat and freezing. The smooth, nonporous surface of the fiberglass has a strong gel coat finish, which makes it less susceptible to changes in water chemistry and means algae have a tougher time growing on it. Despite all fiberglass has going for it, it is not totally maintenance-free. Knowing how to care for a fiberglass pool will extend its life for many years.
Put on a respirator and sand the surface of the slide using 200 grit sandpaper and a palm sander. Scuff the entire surface of the slide getting in every crevice. The fresh gel coat will not bond to old, unscuffed gel coat.
Clean the dust off of the slide using a sponge and dish soap in water. Thoroughly clean the slide and then dry it off using a towel.
Tape any metal that is connected to the fiberglass slide with painter's tape. This will protect the metal from getting over spray on it.
Mix the fiberglass gel coat with the hardener, following the manufacturer's directions on the containers. Use a small bucket and a stir stick to thoroughly mix the gel coat and hardener.
Apply the gel coat using a felt roller and a paintbrush for any hard-to-reach or tight areas. Start from the bottom of the slide and work your way to the top. Let the first coat harden and immediately apply a second, lighter coat. Let the gel coat harden for 24 hours before getting it wet.
Scrub the hard water lines with a soft bristled pool brush. Stiff bristled brushes and other abrasive cleaning materials should not be used on fiberglass pools.
Dampen a clean cloth with white vinegar. White vinegar is a weak acid used to remove hard water deposits from fiberglass surfaces.
Rub the damp cloth back and forth over the hard water lines, until the lines are completely removed from the pool. You may need to remoisten the cloth with more white vinegar while cleaning.
Dampen another clean cloth with water. Wipe the fiberglass pool with the cloth to rinse away the vinegar.
Inspect the pool for remaining hard water lines. If the vinegar solution was not strong enough to remove the lines, apply a phosphoric acid cleaning solution to the pool surface, according to the manufacturer's directions.
Remove the water source from the fiberglass, if the fiberglass is submerged. Pull the boat out of the water, or drain the pool to expose the algae stains to the air and make them accessible to scrubbing.
Fill a bucket with water and mix in powdered oxygen bleach according to the package directions. Dip a stiff-bristled scrub brush into the bleach solution and scrub the algae in a circular motion. If you are working on shingles, a long-handled brush may be easier to use.
Let the bleach solution sit for 20 minutes. If the fiberglass begins to dry in this time, re-wet the area with the bleach solution. After 20 minutes, scrub the algae stains again.
Attach a high pressure spray nozzle to your garden hose and rinse the fiberglass with the water. Rinse from the top of the fiberglass to the bottom.
Use a scrub brush and a gel coat cleaning solution to remove all of the dirt and buildup from the pool surface. Let the pool dry.
Put on a respirator, and sand the entire surface of the pool using 200-grit sandpaper on an electric sander. Scuff the old gel coat until there is no shine left and the entire surface is dull and smooth.
Remove all of the dust out of the pool using a wet/dry vacuum.
Use rags and acetone over the surface to remove any remaining grease or debris.
Tape the perimeter of the area to be painted as well as any lights or other fixtures that are in the pool using painters tape.
Pour the gel coat into a 5-gallon bucket and add the MEKP hardener, following the recommendations on the containers. Thoroughly mix the gel coat and hardener using an electric drill with a mixing attachment.
Apply the first coat of gel coat onto the pool using a 9-inch felt roller. Put the gel coat on thick, evenly covering the entire pool. Let the first coat harden, and then apply the second and final coat. Let the gel coat harden for 24 hours.
Remove all of the painters tape.