I am thinking this is Cyano. it is stringyer than other Cyano I have had. this is in my 5 gallon pico tank at the office. last test was the nitrates were 20 and phosphate was .05 on my hanna checker. LIghting is 18 3 watt LED. the tank is just over a month in setup but the rock was in my 180. it is just plain old NASTY.