There you go, fungi. Oh gosh, that can be nasty. I just set up a whole new tank for FB's because they're getting 2 new FB mates next week. Gees, it took me 3 hours! I made a screen lid myself, did not feel like going to petco. But, I am glad I got it done! It has pebbles, more smooth oval rocks, more plants, driftwood, a treehouse, a small terra cotta pot for hiding, a submersible heater, oh and the land area is larger. I'm going to look at it tonight to relax.