[Phayes]

Before we come to the conclusion that it's cyano, I should add that this LR has just been added 2 days ago, (65 lbs of it, and starting my nitro cycle). Also, there is a 300gph powerhead thats been point almost right on it for the past 2 days. I could only describe this as a sponge looking material (looking at it close up, does seem to be some porous nodules on it).. I'm just not 100% sure that it could be cyanobacteria... thought cyano was more likely to be a slimey/sludge type material in deadspots of a tank.