MantisX
Aquarium Advice Activist
I figure it does the 2 most important things needed to rid yourself of green water. It sucks lots of nutrients and cuts light down a tad. Any thoughts on this?
Still, the best way to get rid of green water is lights out with a blanket or towel and water changes.
It's not the UV light from the sun that causes your problem. It's the sunlight. UV actually kills GW. One of the most common quick solutions to getting rid of GW is a UV sterilizer. Sunlight is very powerful and will almost always cause problems if allowed to shine on a tank for any length of time.