Well water, green to blue

Hdlr15

Silver Supporter
Jun 21, 2020
8
Central Illinois
Pool Size
13000
Surface
Vinyl
Chlorine
Liquid Chlorine
This post is more so for the people searching this wonderful site for answers.

I’m a classic example of having issues with my pool, 100’s of dollars and pool store trips later, still had issues. Came here and followed the 15k post’s that I read and wouldn’t ya know, haven’t had an issue since.

Bought a hot tub, got nervous and didn’t follow what I read here. Green water!
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First thought was obviously metals. I used a pre-filter, previous water tests showed no metals. Added sequestrant, no change, high chlorine didn’t change, as well as low chlorine. Perfectly balanced, clear green water?
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Green water at night. Very clear.
Finally gained my confidence back (not sure why I was so timid with the hot tub) Pondered the million post I’ve read, checked my levels, I did have a pretty big chlorine loss but chalked that up to the uv and ozone. Decided it had to be organic, got nervous about high chlorine levels, metals, and staining on my sweet new tub! Set the filter to run 8x a day, slammed, and wouldn’t ya know. Blue water
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Have decided I have a tannin issue. Still not a 100% on that conclusion but it was organic whatever it is. Just a matter of chlorine, time, and filtration. Going forward I will top off from pool. I’m assuming I don’t notice this issue with the pool because new water is diluted.
Hopefully someone having the same issue finds this and gets an idea.
First time posting so just want to say thank you to everyone here for everything I’ve learned and will learn!
 
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Welcome to TFP! :wave: If it was iron, the elevated chlorine would've made it worse, so it looks like you're on the right track. :goodjob: Did you do an Ahh-Some purge? That would be my only other recommendation if you never did one. Your tub might be emitting contaminants from the plumbing and such that you can't see, and the Ahh-some product is does a great job of cleaning that all out.

How do I use Chlorine in my Spa (or pool)?

 
Plan is to do ahh some today. Water looks perfect today, kids and wife are confused as to why I want to clean and drain it lol when I filled it initially it was late but you could tell it was filled from a well and a prefilter didn’t do as much as I had hoped ( water had a haze to it I guess) Adjusted PH and added dichlor. Woke up and it’s been very clear green tinted water until yesterday. (Filled last Friday) Very high TA (300+) so pH was going through the roof. Got that down to 100 and was gonna see how the PH handled that (needs to be lower) All the while I added dichlor to get cya to 30, liquid chlorine to maintain from there. Filter has been cleaned every day the past three days and for sure has a brown tinge. This is a mild picture of it from this morning. Wasn’t until I maintained a elevated chlorine level that things changed.
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Scum line that took a little elbow grease to get off.
Ive pretty much concluded tannins unless anyone has any other ideas? The filter is a royal pain to get clean after this and still wouldn’t fully come clean. Hopefully the ahhsome will get whatever is stuff in the plumbing. Going forward I will fill from the pool to save the tub the trouble of having to clear it.
 
I suspected that as well. Neither low or high chlorine levels changed the water. Neither did the sequesterant. A high chlorine level maintained for 24 hours had immediate impact which led me to something needing to be killed. Or your right and the filter finally started clearing it when I decided to slam it. Hmmm
 
So I see you have a pool, correct? Does your pool have a sand filter? My pool has a sand filter and it works great at removing the iron in the water so when I need to fill my hot tub, I fill it from my pool. I can plan ahead, overfill my pool the day before, leave the filter running and the next day fill my hot tub from the pool.. works great!
 
Ive pretty much concluded tannins unless anyone has any other ideas? The filter is a royal pain to get clean after this and still wouldn’t fully come clean. Hopefully the ahhsome will get whatever is stuff in the plumbing. Going forward I will fill from the pool to save the tub the trouble of having to clear it.
Try dipping it in a bucket of water with "iron out" in it , if comes out wedding white you will know you have iron.
 
we have pretty high iron in our well. We just put a new liner in the pool but running that much water through the IronMax remover would have taken weeks. I put the hose on to spray and when the pool got full enough to run our solar panels I had the output of that splashing on a 2 x 6 to get lots of aeration. The aeration did essentially the same as the IronMax and the next day we had lots of dark fine debris on the bottom of the pool. Vacuumed that out. Ran the pool another week and the water was sparkling clear. Yesterday I took the DE filter out and it was plastered thick with iron oxide particles. If you suspect it is iron, try aerating with a separate pump or something and see if the iron comes out in suspension. The aeration will also send your total alk lower and the pH up so you'll have to watch that. If its not iron ... nothing lost
 

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After more reading and the comments on here and a post just yesterday in “the deep end.” I think it’s safe to say I have both iron and tannins. High chlorine levels oxidize iron and it gets filtered out as well as destroying anything organic in the well water.
Seems to be a lot of posts about iron and how different it acts. Some people use polyfil, some have staining, some just put chlorine in and let the filter do it’s job.
Either way the issue is corrected with no stains. The plan is to have a fiberglass pool in the near future and hopefully I have the same luck with it! Thanks again
 
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Sort of follow up,
Ran the ahh-some in the tub as suggested and wow. I also overfilled the pool and filled the tub as suggested and that worked perfectly as well. I was curious though so I put a skimmer sock on when I originally overfilled the pool, turned nasty brown rather quickly. Filled the tub up, balanced the water, got bored. Decided to put a new filter sock on and fill the pool again, this time with the pre-filter, at an extremely slow rate. Other than some bugs it’s very white still.
Ordered a tf-100 kit and it was delivered. Same tests as the Taylor kit I had but definitely geared toward the methods described on this site, I will be buying my supplies there going forward. Wish they had the TF-pro.
I also ordered gentle spa, believe I read the 4oz per 150 gallons gets you around 40 ppm? I’m gonna do some digging on here but if anyone knows and suffered through reading this I would appreciate the info!
 
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