I'm in big trouble - I turned water green

[joecus]

Finally, the pool is clear and the chemicals are stable. I opened the filter and totally cleaned it out and ran the filter. Backwashed about 10 times before I got it clear. I noticed the earth in the filter had a light blue color. I've never had this. Is it related to the copper? I used "copper magnet" which is supposed to make it stable and protect equipment.

[PoolDoc]

Yep, blue is one of copper's colors.

PoolDoc

[Watermom]

Now, time to go swimming and start enjoying the pool instead of only fighting with the pool. (But, YOU won!) Have fun!

[chem geek]

Copper oxide is black, copper hydroxide is pale blue, and copper carbonate is green though in practice mixtures occur so you get everything from blue to green. Then there is copper cyanurate which is purple/amethyst in color.