Before I came to this site I had never heard of dosing for ammonia and I've had my tank running for 2 years. I realize that its required for bacterial growth but you get ammonia from the LR die off when its curing in your tank. That's enough to start your cycle. Maybe adding the additional ammonia helps cycle the tank faster because there's more food for the bacteria but your tank will cycle fine without it. It almost seems like people are doing it just so they can fill their tank sooner. If you add some clean up crew it will help the cycle along as well because hermits and snails do produce waste and bacteria would feed on that as well.