Don't think it's fair to blame sunlight unless the water gets too hot. Plants get sunlight in nature.
I think cyanobacteria is very much related to sunlight. Take a look/read on the net. This stuff thrives on sunlight. It's attributed to making the earth breathable.
@Hawk: Sun is only part of what it needs to thrive it also likes lots of nitrates and other wastes in the tank. So sun alone wont do it.
Agreed. But you cannot rule out the sunlight either. The cyano would have been there waiting for all the right ingredients to start growing. The sunlight is one of the ingredients currently helping to spread it...
Ok so I used a generic of the antibiotic called purmicin, work great! Stopped the nasties in their tracks and haven't seen a sign of it since. Also tried it in my planted tank where I have the same problem, within about 3 days I started seeing a change :nuts: So I think it's safe to say antibiotics help because that's the only thing that has changed.
