I'm sure this is answered in half a hundred threads in here but here we go, I have a dersasa maybe 4 or 5 inches and a ultra ora crocea maybe 2.5 inches in my 20gal tank, currently there is a pygmy angel in there that hasn't picked at them but i'm woring on getting him out with a water bottle cut out. I currently feed coral vibrance, photoplankton, cyclopeese(s/p), DTs and a couple other things (not all at once I rotated throughout the week), I feed most of this more for my sps and zoas and mushrooms than the clams as i understand they live pretty much off of my 150W viper, I think its a 14k light but its pretty white so it might be a 10k. I also understand that the zooanthelids, I'm sure that is spelled wrong, pretty much eat ammonia. So now for my question as I only have the one fish in my tank and my ammonia and nitrates/ites and phosphates have always read 0 should I be introducing ammonia and nitrates into the tank? And if I should have should I go about this, I've read an article online about a guy who at the very least seemed like he knew what he was talking about that discussed blood letting into the tank and urinating into his tank, I can only guess that this is done to introduce ammonia or at least I hope this is the reasoning. I'm a little weary about standing on my bed unzipping my pants and feeding my clams in fact I think I'd rather ***** my finger or something and draw some blood. If this is a suggested means of feeding, wow this sounds strange, how much urine or blood shoud I be introducing into the tank and how often? On the plus side I am an O+ universal donor. As for the urine I'm guessing you should be well hydrated and having clear urine to have less impurities... any information would be great. I think this is right up there with the funniest but most serious thing I've ever posted on RC.