how do I know how much ammonia to put into a 55 gallon?? do I just use so many drops?? am confused on this part...am shopping around for my 55 gallon hopefully this weekend, can't wait to get started with it, my lionhead this morning had a mouthful of stones

my daughter chuckled a little but I was afraid he couldn't get the darn thing out
anyways, I want to do the fishless cycling, I read what was on the forum but don't understand cc.
thanks