The natural nitrifying bacteria in your tank will maintain and adjust to it's bioload on it's own providing there is an ammonia source in the tank. If you keep adding the bacteria and there is nothing for it to feed off of they will die off in large numbers and create nasty ammonia and nitrite spikes. A couple of pinches a food 2 or three times a week should be suffice, no need to use the bottled stuff. Remember you can't rush mother nature, if you try to it will backfire on you.
120 Mixed Reef