Cyano or Diatoms?
Thanks again James. Update. Just back from my local and worse fears realized. Four weeks ago or so, I tore the tank down and buffed out the scratches on my Plexiglas tank. All live stock and some rocks and sand were put in my hospital tank. After getting the 80 gal tank up and after 10 days of running the system, I took a water sample in worried about ammonia and nitrate/nitrates levels (new cycle worries). The local store gave the system an A-ok. So back in went the fish and the coral and the rocks and the sand. And, because I wanted the thing looking good for the Superbowl party, I added some coral and some fish (blackcap Basslet and a bicolor blenny) All of these have been lost. Sure enough, today, ammonia levels are up (2.0) and nitrites are at 20. I am surprised at this because it has now been 3 weeks and I would have expected the Ammonia levels to have returned to near zero.
