Metal in the water (Fiberglass 35K pool)

[blk133]

Hello,

I think that I finally figured out that I have a metal stain in the pool.
I took one little Vitamin C and droped it on the stain, in about 20 seconds I could see a white spot around it. (See Pic before/After)

Now if someone could tell me how much of Vitamin C powder do I need to treat a 35000 Gallons fiberglass pool.

My pool was green a week ago because I went on vacation and nobody took care of it.

After I returned I tried to shock it.

For the last 3 days water was at around 12-13 PPM every night, but during the day it would drop to 5PPM so I would add more chlorine at around 6 PM.

My problem is that I don't have anyone to test it 3 times a day.

My current numbers are:
PS233 kit

FC 9PPM
(was 15PPM before I went to sleep, 12PPM when I woke up, I added 3 QT of bleach and now it is at 9PPM) Temp is 77*F Pool was open for the whole day with the sun.
So:

FC 9PPM
CC .5 (maybe less)
PH 7.2
ALK 80-90
CAL 120-130
CYA 20-25?

Please help.
Thank you,
B.

[mbar]

see the post I posted in "brown stains spreading" It answers the question on what to do for stain treatment - feel free to ask any more questions you may have.

[blk133]

When you talk about sequestering agent, which one do you talk about?
Is there a specific one for a fiberglass pool? Can you guys provide a link if possible as where I could buy it?

[mbar]

I used Sequasol this year, the site I bought it from is:
http://www.focuspools.com/products/G...n-SEQUASOL.asp
I have also used Jack's Magic and Metal Free, you can google them and find them online. I would use enough according to the directions for the volume of the pool, and a little extra too.

[blk133]

Thank you very much!

I ordered 4 bottles of SEQUASOL for 35000 Gallons pool, as you said it's better more than not enough.

I also bought 5 lbs of Vitamin C yesterday from one of the websites that you provided a link for.

Can't wait for all of it to come so that I could see a true color of my pool again. Tired of seeing this yellowish/brown tint to it.

Thank you again!
B.

[mbar]

Good luck, and feel free to ask any questions you may have - you're going to love it, it is like magic!

[blk133]

Can someone please tell me how much of Ascorbic Acid do I need to put in a 35K fiberglass pool?

The metal stain is all over the walls and floor.
I tried 5 foam cups around the pool but it seems not enough. Acid desolves very quickly and I started to see white streaks on the wall but overall the pool is still not white.

I have a DE filter EC-75 and it doesn't have a circulate option. It is always filtering. Is it ok? Or should I turn it off while I am doing it?

Thanks,
B.

[mbar]

You will need about 3 or 4 lbs. I use anywhere from 1 to 2 in 16,500 gal. It is ok to turn the pump off and walk around the pool, dropping the ascorbic acid down the sides of the pool. Once it is all dissolved, you can put your pump back on and let it filter. Let it filter 24/7. I would start with 3 lbs, and then if all the stain isn't gone in 1 hour walk around and put the other pound in where you still see the stain. Keep me informed, and feel free to ask any questions you have.

[blk133]

I used about 3.5-4 lbs of Ascorbic Powder, can't say exactly, but I still have about 20% left in the bag.
2 hours later I droped 4 bottles of Sequasol.

I can still see stains in some places they are very lite, but mostly it's looking good.

Do you think it is ok to add more of Ascorbic Acid even though I already added a Sequasol?

When I am adding Ascorbic Acid it looks like it disolves before even reaching the bottom of the pool.

My Chlorine level is 0

Thanks,
B

[mbar]

It does dissolve before reaching the bottom. It is fine to add sequasol right after the ascorbic acid - and not a problem to add the ascorbic acid after. I would wait a while befor adding more, I think after the water filters for a while it will take the rest of the stain off. You can add more ascorbic acid, but it will just take longer for the pool to hold chlorine. The pool won't hold chlorine till the chlorine eats up all the ascorbic acid that is in the water, that's why I try to use as little as possible. You can even wait till tomorrow to add more if you still have stain. Congrats! you're almost finished!