Chlorine pool and the Nature2

[chem geek]

The good news is that the algae growth means that the Nature2 in your pool isn't putting out enough copper (and zinc) ions to prevent algae growth so the level of metal ions is probably not high enough to cause staining. When the level of copper is high enough to prevent algae, then it is also high enough to stain if the pH gets higher towards 8.0. If that's any consolation...

[hzz]

Years ago, before this forum, I bought a Nature 2 "professional" model.

I used it for one summer, and that was the only summer I have ever had an algae outbreak.

I removed the unit, felt bad about dumping it in to a landfill, so I put it on eBay.

If I remember correctly, it sold for $1.00 plus shipping :-)

Not one of my better ideas.