Blue pool water on backwash, liner?

[byeloe]

I just backwashed my pool and the water was a pretty bright blue. I am thinking that it could be from my liner as it is approx 16 years old.

My water is not cloudy at all. There is definitely fading around the main drain, as the liner is nearly white in that area.

Is it time to replace the liner? As it seems fine in all other areas

 

[YippeeSkippy]

Blue dyes are the hardest to manufacture or use on liners, I've heard.

If the problem is only fading you could decide to live with that until the liner is weakened or damaged. Or you could change it out now. Its your call if the only problem is fading.

A 16 year old liner is quite remarkable, I'll say! That's a testament to your chemistry care. :

Maddie

 

[JamesW]

Blue is probably copper. Do you have copper in the pool?

 

[byeloe]

Blue is probably copper. Do you have copper in the pool?

No copper that I know of. This is the first year that I have had this happen. I will take a photo of the blue residue that is remaining at the end of my driveway

 

[byeloe]

Blue dyes are the hardest to manufacture or use on liners, I've heard.

If the problem is only fading you could decide to live with that until the liner is weakened or damaged. Or you could change it out now. Its your call if the only problem is fading.

A 16 year old liner is quite remarkable, I'll say! That's a testament to your chemistry care. :

Maddie

Thanks I am hoping to get through this season at least

 

[JamesW]

That's really strange.

Blue dye from the liner probably isn't going to do that. It might be copper, but it doesn't look like copper.

It's looks like possibly paint.

Maybe a picture of the pool would help.

Do you have a list of all chemicals that you have added in the last 6 months?

 

[byeloe]

Here is a pic of the pool.
I have used bleach, but I am currently getting rid of my left over Cal hypo powder and 3" trichlor pucks, before I go to exclusively bleach.

I have also added Borax to raise ph and baking soda for total all

 

[byeloe]

The photo looks blotchy, but it does not look like that

 

[JamesW]

I really don't think that the liner could cause the problem, but I don't know what it could be, especially if this is the first time that it has happened.

If you rub your hand on the liner, does anything come off?

Does anything get caught in the cleaner bag?

 

[thetekgeek]

I see a robot in the water, does it have any hint of blue when you clean the filter in it? Since it is scrubbing the liner, I would expect it to pick up something if it is the liner.

 

[YippeeSkippy]

If you collect a cup of the water in a clear drinking glass..... is it tinted blue too?

 

[byeloe]

I really don't think that the liner could cause the problem, but I don't know what it could be, especially if this is the first time that it has happened.

If you rub your hand on the liner, does anything come off?

Does anything get caught in the cleaner bag?

Yes the robot filter bag has a blue tinge when I take out and rinse it

 

[byeloe]

If you collect a cup of the water in a clear drinking glass..... is it tinted blue too?

I do not see any blue in the water in the measuring cup that I use for testing

 

[JamesW]

Definitely a mystery. I don't think that it could be coming from the liner, especially if it's never happened before.

 

[byeloe]

Definitely a mystery. I don't think that it could be coming from the liner, especially if it's never happened before.

Thanks for your help