Invert problems… Poisoned Starfish & Snails?
I have a 300g system set up as follows: natural seawater,55g sump with chiller, skimmers, return pumps,55g refugium with red mangroves, Caulerpa, sea lettuce, various algae. I have 3 175w 5500k halides supplemented with VHO actinics that are all vented. I have tested nitrites, nitrates, ph, calcium, magnesium, iodide, iodine, strontium, and my alkalinity. The water fluctuates between 77 to 78 degrees Fahrenheit. Now here’s the problem, just in the past day I noticed that all my brittle stars and my Nudibranchs have become immobile. They are not dead just stopped moving. Everything else fish and inverts are fine. All the hermits, Cukes, other starfish, and all fish are fine and show no signs of any kind of duress or any other types of abnormal behavior. This is the first time I have ever had this happen and was just wondering if anyone else has or might have any suggestions. PS=Tank has been up for bout year and half all was fine till yesterday. Thanks Bill Huggins
