Tannins in Pool Water?

[nrbarnard]

Did as you suggested and it cleared it right up... So with that said, should I keep doing the hydrochloric acid (33%)?

[PoolDoc]

OK. So, you've got iron?

Post full pool and test info (gallons, pool surface, filter type + test results)

And, if possible, find out WHERE the iron is coming from. One way to check is -- if your toilet fills with the same water as the pool -- is to check the toilet tank. If the interior is dark orangish-brown . . . you have iron in the fill water. (But, if you have a softener or iron removal filter on the house this won't work.)

Meanwhile, run the filter 24/7, but make sure the return eyeballs are directed so that water flow is NOT directed against a pool surface.

[nrbarnard]

Ok, finally got my numbers with me to enter them onto this... I think the Iron content is mostly removed... I did the 5 Gallon Bucket/Poly-fil project to get rid of a lot of it. And not as much is appearing in the pump filter anymore. Below are the updated numbers from two days ago. Water inside the house is taken care of by the culligan system. I am adding 1 quart of Muriatic Acid twice a day currently. Could also use some guidance on Chlorine. Currently using regular clorox bleach.

Intex 22' x 52" Round Above Ground Pool
10,000 gallons
2500 GPH Cartridge Filter

PH: 8.5
Alkalinity: >250
Hardness: 480
Total Chlorine: 3.2
Free Chlorine: .3
CYA: 2

[PoolDoc]

"2" is not a possible reading for CYA. Did you mean "20"? What kit are you using? Anyhow, with ZERO algae, your FC should be 5% of your CYA.

Are you using 31% muriatic from Lowes, etc? If not, you should be. I don't understand how you have pH/TA/CH that high without cloudiness. But if 1 quart at a time is not producing a change, go to 1/2 gallon per dose.

UNLESS . . . you are using diluted acid. If so, try 1 quart when you get full strength acid. And, READ the "Using Muriatic Acid" page linked in my signature.

[nrbarnard]

I seriously appreciate all of the information. Can we donate to your page somehow?

The printout I received from the pool store has the CYA at 2. I am using the full stength acid. So I will up it to half gallon doses.

[PoolDoc]

Thanks; you can 'subscribe', using the link in the upper right corner of my blue sig. box.

Currently, subscriptions don't get you much, so it would be a donation.

[nrbarnard]

I am now subscribed.

So good news and bad news... Got the Alkalinity down. I don't have the numbers in front of me, but its around 120. However... PH dropped quickly, I should have tested every day, but didn't. Its down to 6.6. First and foremost, is that safe to swim in? I read your other post about Borax. I have added 6 cups of borax (10,000 gallon pool, 1 dose) last night. I will be checking today to see how the pool adjusted.