Stains returning

[mbar]

I would pick some up. I haven't tried it yet - I have some, but have not had any staining yet. I have read some posts on the board who have used it. It may not take the stains that have been there for a long time off - but once they are off with ascorbic acid, it is supposed to turn the metals into crystals so that they can be filtered out. YOur water may not test positive for metals if the metal has already precipitated out onto the surface of the pool. If you post your numbers, I will help you through the stain removal.

[Roddapool]

Thank you

I'll post numbers tonight

[Roddapool]

The pool store said I did not have any Copper or Iron in the water.
I’m giving you the numbers from my new test kit not from the store.

CA=32
PH=7.8
TA=130
CH=90
CYA= 85


I did the Vitiam C test (it took it off) and was told at the pool store to use algaecide so I thought I was fighting algae so I was keeping my CA high and scrubbing the pool.
They did not have any Metal Magic so they sold me United Chemical Pool Stain Treat to get the stains off.
Thank you for your help.

[Roddapool]

one more thing it's a 25000 gal kidney shaped pool with a heater
DE filter

[gerri]

I used metal magic - while it wasn't exactly magical about taking off some tough old iron stains it did further lighten them - nothing so far has completely removed them though so it worked as well as Ascorbic Acid and better than Oxalic. One thing I do notice though is that I had little granules on the bottom after a couple of days. They were rust colored.. so possibly, and just maybe it did cause the iron I have to drop out of the water. I'm still seeing a bit of it each day and I'm cleaning it out each day. It looks like rust colored sand. It did take me a week to get my water clear again after the metal magic treatment, so I didn't post before now about results because I really couldn't tell about the stains. They are still there a bit, but lighter than ever. I think 1 more AA treatment may do the trick.

[gerri]

United sells the Oxalic Acid treatment, so that's what you have from the pool store. You need to drop your chlorine down to 0 and lower your Ph to 7 or 7.2 and then do the treatment, that way you will get the best results with it. Expect cloudy water and after 48 hours start bringing your Cl back in gradually. If the Oxalic doesn't work I would have to recommend the Ascorbic Acid treatment and preparation is the same for that treatment as well. Running high Cl will be making your stains stick better so lower it and stop running at shock levels, if the stains aren't organic (algae and such) then it won't take them off and you're making matters worse.

Good luck with it. Let us know how it goes with the United (Oxalic) treatment.

[mbar]

Is CA chlorine? If so your chlorine is high along with high ph which will make any metal that was in the water fall out onto the surface of the pool. United chemical is an oxalic acid. It will bring down your ph, along with your chlorine. With such a high chlorine level it may take a lot of stain treat, because the chlorine will eat up the oxalic acid. Even though your water didn't test for metals, it was in there - it can come from many things, fertilizer is one. Is your pool a plaster or vinyl or fiberglass. If it is plaster a calcium of 90 is not enough, you need 200 - 400 in a plaster pool. If it is vinyl or fiberglass 90 is fine.

I would suggest letting your chlorine fall to normal level before doing the stain treat (so that you will not need as much product) - which for a cya of 90 would be 10ppm. You can use some muriatic acid to get your ph down while waiting for the chlorine to drop - I would take it down to 7.2 - 7.4. Your alkalinity is a little high also, it should not be higer than 120. Then you can do the stain treat, which will bring down you ph and alkalinty. Post your numbers after the stain treat - let me know if all of the stains come off. Good luck.

[mbar]

Hi Gerri, It sounds like the metal magic does turn the metals into crystals - I would put a little more ascorbic acid in, so it will lift the stains off, then combine with the metal magic to get rid of it. Metal magic sells an ascorbic acid based product to use along with the metal magic too, so that's why the stubborn stains didn't come off with just the metal magic. Hopefully this will be the cure!! Please let us know how it goes.

Roddapool, Gerri is right about the low chlorine and ph to get the united chemical stain treat to work better, but it is ok to use with chlorine, it will just use up the chlorine in the process. It will take the chlorine and ph down on it's own. It will tell you on the container that you can use it with chlorine and ph. It just doesn't tell you that you will need more product to do the work. So it is up to you. Let us know if it doesn't take all of the stain off - because there are other ways to get it off.

[waterbear]

Metal magic sells an ascorbic acid based product to use along with the metal magic too, so that's why the stubborn stains didn't come off with just the metal magic. Hopefully this will be the cure!! Please let us know how it goes.

Marie, I do not think that Proteam sells an ascorbic acid treatment. As far as I know Metal Magic is their only stain treatment and seqesterant. NaturalChemisty does sell ascboric acid under the name of 'Stain Free'. It costs about $30/lb.

[Roddapool]

Thank you for all the info sounds like I'm on the right track.

One more thing, as I was cleaning out the filter I noticed that the filter elem. had a redish/brown stain on it. Does that sound like the same as my lyner and should I do the same treatment (soaking it in a garbage can) before or after I do the Pool.