I have no idea. A rookie I would seem to be, but it is brown and growing close to where the lights are on the tank.
I've attached three pics. You can see the brown colour on the fake ruins. It is also on a couple of plants. In one of the close up pics you can kind of see the white egg type things off in the left hand corner and the third pic is the tank and lighting system.
Note: they (white egg things) are gone as of a day later (today)...
Not sure the size of the tank. This was the girlfriends thing and she's gone for a few weeks. Of course things go weird when she's gone! I'd guess two feet by one and a foot high.
The tank has been going since March-ish. But we've been adding fish every now and again. A couple have died... This is how Killer got his name! lol But, currently there are four fish including the beta and one minature frog.
My girlfirend should be doing this as she's the one who started all this and I didn't pay a lot of attention to what type of plants, etc. I know the lights are suppose to be good for the plants so I assume they are not tungsten bulbs. I cleaned the tank recently and put a half cap full of a tap water conditioner. I know a test was done about three or four weeks ago and all the levels where fine. We have a home kit.
Any help would be cool. Sorry for the lack of info on my part. The Fish King loves fish, but appearently knows @%$*&!!! about them!
Read somewhere to wash off what has the brown mold or algea and change the water. Up to 50%. Might just remove the plants that have the brown stuff on them. But, again, any help would be awesome!