Clear, green, then clear???

[Toohotonthebayou]

We had a great deal of rain last week and I lapsed on checking the water for a few days. Well yesterday I went to check the levels and it needed some salt and FC was zero. I dumped some salt and a gallon of liquid chlorine. After about an hour or two it turned green. Well my Wife went today to buy more liquid chlorine so I could slam. We both get home this afternoon and the water is clear again. What gives? I still plan on slamming tonight/tomorrow .

 

[mknauss]

Iron?

 

[Newdude]

Hey toohot !!! You got yourself some metals. Iron or copper. And they are going back and forth between soluble and insoluble. PH or high FC can make it appear like magic. Check the pic in post #6 in my man @mguzzy 's thread

What I thought were old iron stains on my cartridge filters, is iron my water!

Hi all Amazingly I found no posts on the forum about this. So I was the victim of the dreaded Iron contaminated Clorox Pool Salt about 3 seasons ago. Apparently it was worse than I thought. There is a nice darker area in my mottled dark plaster in the deep end from salt additions from that...

www.troublefreepool.com

 

[Newdude]

And wait till you hear THIS !!!!!!! Are you sitting down ???? Ahem.

Have your water checked at the pool store.

I know I know I KNOW !!!!! We always say to steer clear !!! But this is one that can only either be done by them, or an expensive private lab. They actually have pretty decent results too.

 

[Toohotonthebayou]

Thanks all!

 

[mguzzy]

If it turns green and back in again in the span of hours.. its not algae.. its IRON! Either that or as in the Land of Oz they say, "You have a pool of a different color". I watched that happen to mine in about 20 min. The chlorine is changing the pH and causing the Iron to change form and come out of solutions.. Look at the pic in this wiki.. does it look familiar?:

Ascorbic Acid Treatment - Further Reading

www.troublefreepool.com

So.. if you bring your FC up again and while it is green, you can filter out the iron that is in solution with the polyfill in your skimmer basked trick.. Look at my pool in the thread that the Dude linked to.. If you feel a hankering to do a SLAM I would do a OCLT first and see if it is really necessary.

 

[mguzzy]

What is the source of your fill water if ya don't mind me askin'?

 

[Toohotonthebayou]

It’s been rainwater since at least the call to be honest.

 

[mguzzy]

Some how you got Iron in your water... what brand salt have you been using? The Clorox brand salt is known to have iron contamination, so does well water. As well as some municipalities. It accumulates over time and may have reached a point where it is now rearing its green head.

 

[Toohotonthebayou]

Honestly I am not sure. When I built the pool the builder gave me about 15 bags. I will have to see if I still have a bag. In other news my Fas-Dpd kit showed up today.....

 

[mguzzy]

oh geeze.. is there even any power in the container! Who did you order it from?

 

[Toohotonthebayou]

Off Amazon but I need to see the actual 3rd part seller. I did not open it yet but I wasn’t happy when it spilled all over my counter.

 

[mguzzy]

It looks like the 0870 is already open! I hope you got it cleaned up.. that stuff stains.

 

[Saturn94]

Off Amazon but I need to see the actual 3rd part seller. I did not open it yet but I wasn’t happy when it spilled all over my counter.

That’s the reason I stopped ordering reagents from Amazon. You never know what you’ll get (I had past issues being sent expired reagents).