I've seen differing amounts suggested. The bacteria will grow at the same rate but if you keep a higher level of ammonia you will end up with more bacteria and can presumably fully stock your tank when your cycle is complete. I used .5 when I fishless cycled my tank but I didn't want to stock it fully all at once. I like to take my time
. You are right wataugachicken this thread does suggest 5ppm. It's all in what you want to do. http://www.aquariacentral.com/forums/showthread.php?t=57791&highlight=fishless+cycling
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