Is this Iron?

[Briandpeterson]

Ok been slamming. CYA 50. FC 20. Last two nights have lost no chlorine. Yes I use well water. I have tested it many times and iron count is very low. No rust in tubs, etc. Replaced pump years ago and well guy was shocked the pump looked new!!!

Anyway, I have had a pool for 4 years. I don't remember ever having this issue before. This time I have followed slam to a T. My water over the winter did not lose its CYA which was odd and new.

I need an opinion of this photo. I wonder if this is not algae. But iron. I wonder if I let FC drift down to 5 ppm it will go nice blue like it usually is. Or am I screwed and have to do Polyfill?

 

[Briandpeterson]

The reason I ask is Slamming guide says never stop until it's clear water. But my brain goes green is not clear! Keep slamming. People say a sand filter takes forever to clear it out. But based on how clear to the bottom, but green. I think I need to let FC drift down and see what I got. Agree?

 

[Briandpeterson]

The photo is not the best with that shadow. But you can clearly see my liner seam with a bit of dirt.

 

[mknauss]

Put vitamin C in a thin sock, crush it a bit, and put on the stain.

 

[Briandpeterson]

Thats for stains, right? The sea green water is what I am trying to fix. That dark line in the photo is just some dirt particles caught in the liner seam. No big deal. I live off a gravel road. Dust is a constant battle. My water is pretty clear to the bottom. Not cloudy.

 

[mknauss]

Put polyfill in the skimmer basket. See if it turns brown

 

[LadyKate]

I have had good results putting in white skimmer socks. After an hour you can see if there is iron in the water.

 

[wireform]

Follow the above advice but your CYA being there doesn't mean that it can't be algae either.