Stains in Fiberglass pool

[waterbear]

Iron is your problem, Oxaylic acid is a known remedy for rust (oxidized iron) stains! It is toxic, however. Phosphonic acids are also effective and are the active ingredient in most of the "metal removers" I have seen. You can learn a lot about a product by going to the manufacturer's website and reading the MSDS for it. Ascorbic acid works (if I am not mistaken) by acting as a reducing agent just like Oxaylic and Phosphonic acids. These will also lower your pH and their effectiveness is dependant on pH so read your directions!

[cajunfla]

Have you tried the new Mr Clean Magic Eraser? My fiberglass pool gets a dirt ring around it. Not all the sod has been installed yet. Mr Clean works wonders.

[msehome]

http://www.msm-msm.com/store/agora.c...scorbic%20Acid

I have a 35,000 gal fiberglass pool and it stains all the time. Dont have a heater, and no iron pipes. It takes about a pound to a pound and a half of ascorbic acid to make the pool beautiful again. This is the cheapest I've found for it. $45.00 for 5 lbs. and if you buy over $100.00 at a time its free shipping. Heres a pic of my fiberglass pool.


Good Luck

[BarryY]

Thanks, msehome, I'll give it a try. Does it turn your water cloudy when you add it?

[msehome]

Not at all, its amazing to watch the stain dissappear right before your eyes. And the water stays clear.

Good Luck

[BarryY]

OK, I just ordered some. Can't wait to try it, thanks.

[mbar]

I also have a fiberglass pool, and I have learned to deal with the stains pretty effectively. When I get stains I use ascorbic acid, and a metal free product. The cloudy water is the metal free agent combining with the metal that has come back into solution. If you have a lot of metal in solution and the water is cloudy, you should not start to bring up your chlorine until the water is cleared - you can put a chlorine puck in the basket so the metals will stain the filter. You have to try and keep the ph around 7.2, not higher - it is hard to keep the ph there, because the stain treatment brings down the ph, plus the puck in the skimmer will add to lower ph. Be sure to keep your filter running 24/7 - once the water is clear, you can start to bring up the chlorine. I use regular bleach, and I don't run high chlorine levels - it isn't necessary especially if you keep your cya under 50. In my opinion, fiberglass pools tend to stain, I now treat it heavily at the beginning of the season with a metal free product, and keep the filter running 24/7 when I have high chlorine levels. All water and pools are different - you will have to experiment with yours to see where you need to keep your chlorine & ph to keep the stains away. Don't worry so much - if it stains, it can be taken care of!