I am starting the cycle on the big tank and want to do it with ammonium chloride. I have been researching it on the web and am getting different target ammonia levels. Some say spike the tank at 1-2 ppm and some say 3-5 ppm. I do know that I want to cycle for a high bio load of a vulgaris so I am thinking of using the 3-5. I figure that if I happen to get a younger one and it doesnt need the filter capacity -it can't hurt it and will diminish on its own. I got some ammonium chloride powder from the Tampa Aquarium guys who were helping me out, but I don't know if it will be enough for multiple spikes and to maintain the load for 3 months. I don't want to buy 2000 damsels and would like to stay away from a conventional livestock cycle all together to minimize the risk of adding disease to a virgin tank. I plan on adding some live rock to the base rock I have, but want to have some choice pieces and don't want to kill them. I was thinking about uncured live rock, but I don't want to spend big bucks and have everything I paid for die. I talked to my wife about the problem, explained the nitrogen cycle, etc. I told her about the ammonia needed to start the cycle and maintain it. She suggested peeing in it. I laughed , stopped , thought about it , researched it , and found it plausible. But I can't bring myself to pee in the tank and then adjust the rockwork. Has anyone done a fishless cycle using ammonium chloride, what was your target ppm, and how did you maintain the load for 3 months?