Water badly discolored

Neo337

Member
May 10, 2015
21
Memphis, TN
Just started to open the pool yesterday. It was a little dirty on the bottom, but water was clear. So I filled it up, got the pump started, and vacuumed out the dirt. I had to leave for my son’s soccer game, so I put some shock in it until I could check everything. A couple hours later we got home and the pool was a brownish yellow color. You can still see through it, it’s not cloudy or green, and I am not sure what caused it. Here are the results when I tested everything:
FC - 12
CC - .5
pH - 6.6
TA - 30
CH - 60
CYA - 40
What could have caused the discoloration? I believed it might just be algae, but the FC would start dropping I thought. I tested again this morning after balancing a few things and here are the numbers:
FC - 12
CC - .5
pH - 7.2
TA - 60
CH - 60
CYA - 40
Our neighbor has several pecan trees that are dropping tons of crud in our yard and pool, and I was wondering if all those pollen strands could cause it? I attached a couple of pictures, one of the pool and one of the mound of pollen we have to continually remove. Any help would be appreciated, thanks!
 

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Neo337

Member
May 10, 2015
21
Memphis, TN
Ok, so I have been doing the SLAM for a few days and the pool is changing slightly, water is very clear, but still discolored. I looked into it and I believe it is all the pollen (we have a ton). So would some DE in the filter take the pollen and discoloration out of the water?
 

Bob_Funk

Well-known member
If your water is still very dirty DE in your filter will almost instantly run the pressure up & you will just have to backwash it out.

I have great results using skimmer socks to keep the pollen & cottonwood out of the filter, you will be surprised how often you will have to rinse them out.
 

JamesW

TFP Expert
Mar 2, 2011
16,341
I think that it's probably iron. I think that if you added ascorbic acid, the pool would clear instantly.
 

Neo337

Member
May 10, 2015
21
Memphis, TN
I will check again when I get home. I have been losing very little FC, and almost 0 overnight. I put DE in last night and checked this morning and it was better, but still discolored. The water is very clear and loses very little FC each day. I am going to keep SLAMing it and using the DE. If it has not cleared up in the next few days, I will try ascorbic acid. I just am unsure if it is iron, because we didn't have this issue last year. Thanks for the help!
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
I just am unsure if it is iron, because we didn't have this issue last year.
Keep a close eye on anything that may begin to discolor like white steps, trim, the skimmer, etc. Odd staining too. If you see something that does, apply some crushed vitamin C tablets in a thin sock or nylon on the area. If it gets white again, it's iron.
 

Neo337

Member
May 10, 2015
21
Memphis, TN
Awesome, thanks for all the help. The pool looks much better now after using the DE, but still has a slight discoloration which I think is now due to stains on the liner. We bought this house last year and it had a very old, stained liner that always made the water not look its best, but not as bad as it was. I will try the chlorine tabs and vitamin C to try and see what kind of stain it is and fix what I can. We are planning on a new liner next summer.