I'm in big trouble - I turned water green

[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.