Hi everyone! I have a 5 gallon tank for about half a year and I'm battling algae for some weeks now. I reduced the lighting from 12 hours 10 and it's an ongoing battle. Is this green spot algae or black beard? I had black beard in another tank but it wasn't as flat as this.
Also, is the stuff on the glass the same type?
Lastly, is there any hope of fighting this without a filter? This was a little project of mine that started with no filter, no lighting, no ferts, no heater and no air stone. In the meantime I got a heater and some lighting for it.