That would be green algae on a piece of driftwood. Its all real. Every so often I spot treat the log with h2o2 to keep it from spreading.Is that green algae on your drift wood? Or is it green hair algae? Or is it fake?
Great looking tanks everyone!! Keep the pics coming everyone!!
What lighting are you using ?There are some nice tanks pictured in this thread .
OK, just to be no spoilsport, I'll add a blurry pic of my freshly pruned 20 L (unfortunately, I don't have a "before" shot) with dirty front glass .
In principle, 2 T5 double strips from Coralife with one 6700 k and one Colormax bulb each. As one of those just stopped working (starter doesn't work), I put the standard hood light in the back for the pic. All those algae are due to my cat disconnecting the CO2 without me noticing it for 2 weeks.What lighting are you using ?