100,000 gal pool

[PoolDoc]

The fact that you have CC=2.0 is not good.

You need add muriatic acid till the pH comes down. Read http://pool9.net/ma so you can handle it correctly and then add acid, a gallon at a time. Make sure the pump is on while you add the acid, and for at least 2 hours after. Continue to dose with gallon doses till the pH is 7.8 or below.

For a 100K gallon pool, with CC=2, dose with the dichlor at the rate of 1/2 gallon (about 5 pounds) at a time.

?'s:

1. What does the water look like? (clear/cloudy/opaque; blue/gray/greenish/dark green; odorless/chlorine smell/swamp smell
2. Are you running your pump 24/7?
3. Have you opened and cleaned the filter this season?
4. Can you purchase 100# drums of calcium hypochlorite?

Please explain these dimension:

Size 260"x260"x272" pool 96" spa

260" = 21' 8"
272" = 22' 8"

5. Are you saying your pool is a 22' cubic hole in the ground?

[CarlD]

This is why I said Ben is better with such giant pools than me. I'd never think to add Cal-Hypo to a pool with Calcium Hardness at 440ppm.

[4dks1]

Hi, this morning the pool is light green & milky. The 100# dichlor was scattered in before I got this post. 1 gal of muriatic acid was added last night. This is the lightest green the pool has been since last September!

Is there a way I could post a picture of the pool? It's very irregularly shaped.

Yes, the pump is running 24/7. The filter has been cleaned a number of times. It was back washed yesterday.

I will test the water again this evening & send the results.

[Watermom]

You can either use Picasa, Flickr, etc. to post your pic or email them to poolforum@gmail.com and include the thread number 116949.

[4dks1]

The pool smells like the ocean.

I emailed the pictures.

FC .6ppm
CC 1.2ppm
pH below 7.0
TA 80
CH 500ppm
CYA-I don't know if this is correct, I will retest.

[PoolDoc]

Definitely, do not add either baking soda or washing soda, with those values. If you raise the pH with washing soda (soda ash, sodium carbonate, pH Up, etc.) while having a CH=500, you're likely to precipitate calcium carbonate and make your pool look like milk.

You *can* use cal hypo, but add it via the skimmer after making SURE -- 100% sure -- that there is no feeder or gizmo anywhere between the skimmer and the filter. Also do NOT add CYA immediately after adding cal hypo, and do not add cal hypo within 3 days of adding CYA to the skimmer.

BUT . . . raise your pH, ASAP. You could use caustic soda, but that stuff is nasty to work with and usually expensive for consumers. Instead, go to Walmart and clean them out (up to 20 boxes): http://pool9.net/borax/ (Actual box is now mostly white, not green.)

Add boxes, 5 at a time, to your skimmer. Do it slowly, with the skimmer running. Do NOT choke the skimmer: borax can 'meld' together and form a solid, hard-to-dissolve, lump in your pipes if you do. Wait 4 hours to retest your pH.

[4dks1]

May 21 at 8:52 AM

ToThe PoolForum

Hi,

The CYA was way below the 100 mark. I tested it 3x. So I guess it's high.

The original owner of the house & the one who had the pool built told us it was 100,000 gals. The original filter was 90 until 2012 when this new one was bought.

Half of it is 8' deep & the other half is 5'. The push out area is 3' deep.

Here are the measurements just taken:
Length 48'1"
Width 40'2"

Thank you for your help.