EcoFinish discoloration

History? Show up all at once, gradually, from addition of chemicals, water, etc.

Eco is like a vinyl liner. Cal hypo, acids, etc can effect it.
 
Thanks - pool chemistry has been fairly reliable and consistent this season. PH has drifted up a few times, which we've managed. Salt pool. Hard to tell how quickly this happened - I hadn't been playing close attention. My wife brought it to my attention.
 
We have not had any long term results from owners with EcoFinish. Seems to have been a thing but is now not being installed much. Really dependent on installers.
 
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