My moon water turned green - is there a message that I can't decipher, or just mold?

I'm newly coming to know myself and tuning in with my spiritual side, so please forgive me if I am asking a silly question.

I feel like there's some symbolism or meaning behind my moon water shading green.

For context, this jar I set out during the blood moon on Mar 3rd, and left it on my windowsill since. I wasn't sure how I wanted to use it, and my thought was - it would only charge more with many moons.

Today I noted a green hue to the water and immediately searched if this was common or if someone else had deciphered hidden meaning in green moon water, but found nothing.

Please let me know if leaving the water out was wrong, or if anyone has any insight on what's being said, I would love to know!!