Removing stain from F/Glass Pool

Hei Guys,
Posting this for my aunt who is a walking vindication of every blonde joke ever told.
She has a fibreglass pool into which she put a "winteriser" from Jim's pool shop.
The instructions stated that you dilute the stuff in a bucket of water (the stuff is bright blue in colour) which she didn't do, she just threw the stuff in the pool.

She now has copper stains on the pool, she tried a stain remover from the pool shop that was guaranteed to work - it didnt work even after the 2nd and third bottle which they gave her free under the guarantee to work

I don't know the names of the stuff she's used - bottle and chemical colour is as technical as she can get.
Does anyone know what you can use to remove copper stains from a fibreglass pool.
Cheers
Smidsy

Go back to Jim's pool shop and or the manufacturer.

Personally I wouldn't think that diluting it in a 9 litre bucket would make too much difference when it is going into a few thousand litres of pool water but then again who knows.

Smidsy, you have to dilute it first in a bucket to dissolve it . If you throw it in undiluted it will go straight to the botttom and stain !! :D :D
Planepig.

I know that - if you read my first post you would see that that is what my dopey blonde aunt has done.
What I need to know (or she does) is how to fix it.
Cheers
Smidsy

Try using Oxalic Acid, it removes most stains from gelcoat.

Wet an area with the acid, let stand for a few minutes and wipe off.
It may require several applications for strong stains, but it has worked for me when ever needed.
Oxalic Acid is also used for blonding timber and can be obtained at good paint or hardware stores.

Glenn.

Just sit back and wait for summer. Ultraviolet light will slowly degrade the blue organo-copper algicide. Keep the chlorine level up to assist.

Ed T