Hi. Over the last few weeks I've noticed my tank water has had a green tint. I'm pretty sure it algae because you can see it on the sides where the snail eats it and some is on the rocks. I clean my tank every other week and the next day it's hot that tint again. Is there a way to stop or get rid of it? Should I try to completely get rid of it? My tank don't sit in direct light and the temp is about 77 degrees. I have 4 guppies and a snail.