Stonescapes Aqua Blue finish turned black

[PoolguyinCT]

Mis-bonds & stray currents with sequestering agents do some pretty wacky stuff, particularly when cl generation is involved.

I’m going to check aqua mag, really just to see who wrote it.

 

[onBalance]

I just skimmed over all of the posts.
Has there been any consideration that the problem is that the blue pigment has been bleached out by chlorine?
Which then leaves the dark gray color as the dominate color?

 

[PoolguyinCT]

A cored coupon or a discrete chisel if skimmer throat is plaster would answer that.
- but a post indicates it did not react to acid when a piece was removed from the pool.

 

[onBalance]

Post #35 says that a "scratch test turned up blue"- that seems to indicate that perhaps the non-affected blue underneath can be exposed. ???
The acid treatment may not have removed enough material to exposed the non-bleached blue pigment. ???

Here is a link to an WaterShapes article written by onBalance about color pigments. Pigments and Pools | Pools/Spas | Watershapes

 

[PoolguyinCT]

I’ve read that link many times. Btw- I’m actually a big fan.

 

[fredpamm]

I'm in contact with OnBalance Thank you!

 

[fredpamm]

Update:

We have had several pool companies come out to test. there is no consensus on what has happened other than they've never seen this before. All tests performed sow nothing. The manufacturer says that a corrosive environment can turn their finish black. I have the pool chemistry records and nothing indicates corrosive.

So at this point it sounds like an attorney is going to have to get involved.

Thanks to everyone including OnBalance for their help in this situation. For now I am going to close this thread and start another. Has any Stonescapes Midnight Blue (yes we got the wrong finish) turned black?