Pool Still green after 20 gals of bleach...1st time post.

[Steve V]

She's full and filtering over nite I will do the Taylor kit in am. The strips showed fc and tc still at top of the chart tonite. Cloudy water but I can see the bottom.

[Steve V]

Monday numbers

FC 14
cc .5
TC 14.5
ph 7.0
alk 125
CYA 50-60

by the best guess I need to run 5-10 ppm
I need to shock 20 ppm
using cya table 60-90 to be safe.
Do I raise it to shock table now to lower cc?Water is cloudy with light green tint. Filtered over nite and have no intentions to turn off.

[aylad]

Yes, because of the greenish tint--I would raise it to shock value now and keep it there until the pool clears, and until you can measure chlorine at sundown and again at sunup without losing any chlorine,.

Janet

[Steve V]

Sundown 21ppm Sun up 16ppm added more bleach. Cya was 50 last nite...hope that's good enough.

[madwil]

50 is fine for CYA- and you don't need to test it again for awhile; save the reagents!
just keep it up with the chlorine, and watch your pH to ensure it stays 7.0-7.8 range; slightly high is ok at your chlorine levels, as the chlorine makes it read high...

[Steve V]

Will do. I will test ph and chlorine tonite and go from there. Also gonna try to vaccum the bottom for fine silt debris. Chlorine was 14 about 10am monday,added 1 gal bleach and it read 21 last nite...looks like it lost hardly any in sun. Lost some overnite though.

[Steve V]

Tues PM 22ppm
Wed AM 21 ppm
That difference could be my readings. I added no bleach before I left for work.
Vaccumed last niite and it looks really good. No real debris in pool water almost clear. Gonna put stairs in it tonite. Maybe by the weekend it will be ready.
PH was 7.2 so I added a little borax to raise it.

[madwil]

What's your CC? that number should be <.5, and you should be done shocking!
Your pH will probably slowly rise as the water aerates- 7.2 is fine, as long as it doesn't drop.
I add about 3 cups acid every 2-3 weeks in mine, to keep pH below 7.8...

[Steve V]

CC was <.5. I am doing the 10 ml test cause it uses so much regant. I will do 25ml when Cholrine levels drop to normal to fine tune.

[PoolDoc]

Hi Steve;

I'm gonna 'pull rank here and close this thread to EVERYONE except me, Chem_Geek, Waste or Waterbear.

It's taken me 15 minutes to chart out all that's gone on with your pool, and work out what might be going on. Mostly, I think you've done what was needed, but you're getting see-sawed around a bit. (History table below)

So, here's what I think, based on what I've read and pieced together.

#1 - Your initial CYA was > 150, since you've drained more than 2/3 and still have ~50 ppm. Draining was a good thing.

#2 - You are fairly clear -- but some of the lack of clarity may be well water. Do you know what's in your well water? Most wells have some minerals / metals.

#3 - You should ignore CC levels of 1 ppm or less when your chlorine is > 15ppm, and stable. You report no change (22 => 21 ) overnight . . . so your chlorine is stable.
(There is some bleed over into CC readings, as chlorine gets high -- don't know why, but I've seen it repeatedly. Pools in full sun with stable chlorine levels do NOT have significant CC levels . . . no matter what the test shows UNLESS you've added something really strange to the pool.)

#4 - Your pool is greenish, but high in chlorine and clearing up. I'd recommend going ahead and swimming. Just tell your wife to wear that old 2-piece or bikini she want to replace anyhow -- she'll be fine, but 20 ppm FC w/ 50 ppm CYA will be hard on Lycra swim suits.
(You may like the results, however -- I have some fond memories of swimsuits my wife had that had lost some of their 'substance'! Might not want the neighbors over though. ;-)

#5 - You should feel the sides of your pool. If there is no slick/slimy feel . . . the green color is NOT algae, rather your algae is gone, except maybe for cracks and crannies.

#6 - Green clear pools can be a result of some peculiar iron conditions, but will clear up in a few days (maybe a week) if you just keep your pH in range and keep chlorinating.

#7 - At this point, I think trying to 'fix' anything with your water, as opposed to simply being patient and staying on course would be a mistake.

#8 - Haven't looked at your filter thread, but if there's anything wrong with the filter's function, fix it! Pools do NOT stay clear from chlorine alone!

Enjoy your pool!

Ben



10K pool, 2nd year of use
+ opened green with leaves & sludge
+ 2 weeks of being pool-stored
+ used 3" tablets
+ sand filter, regularly backwashed

05-21
+ 20 gal bleach

05-22 - Sunday
+ 5 gal bleach + 1# CYA + 1# 'shock'

05-23 - Monday
+ 10 gal bleach
+ some improved clarity; brushed

05-24 - Tuesday
+ pH 7

05-26 - Thursday
+ added 1/2 box borax
+ chlorine high (test strips)
+ phosphates "extremely high" (per pool store)

05-27 - Friday
+ FC 40, CC 1.5
+ ph 7.2
+ CYA > 100ppm

05-28
+ drained 2/3 or more

05-29
+ FC 15; CC 0.5
+ pH 7
+ CYA 50

06-01
+ PM FC 22; AM 21