Tannins in Pool Water?

[nrbarnard]

Thank you for the response, Pooldoc. The entire village supposedly has tannins. But I think it is just iron. Took a sample to the pool store to have it tested. He said that he has treated many pools from that village. Alkilinity is way high (>250). So he gave us a liquid chemical (super potent). Was told to add 32 oz twice a day for 4 days. Then bring another sample in. After running the pump for 24 hours, I checked the filter and it was orange. This is village water, not well. Rest of the tests were fairly close to acceptible ranges.

[PoolDoc]

Sounds like iron.

If you get some of the orange filter waste or goo, put it in a glass with enough water to suspend it, and add either some Vitamin C tabs (ascorbic acid) or some Iron Out. If the water clears . . . it's iron.

Likewise, if you have an orange spot you can reach, but a few Vit C tabs on it, or a Iron Out paste (in a twist of Saran wrap). Again, if it clears, it's iron.

[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.