hydrophyte said:That umbrella sedge and the sweetflag are both excellent riparium plants. Great find!
Pixels said:This is looking very impressive now.
Makes me want a bigger riparium. I wonder what my chances are of getting another tank into the house?
it is bacterial. It may be a Leptothrix species, in which case it is a to do with the REDOX reactions in the sediment.I have a really thin layer of "oil" on the top of my water when i disturb the water it breaks up