I have to disagree with a few things here.
Bacteria do live on pretty much every surface in your tank, and you may vacuum some out when you do a water change, but you definitely do not add them when you refill the tank. The chlorine/chloramine in your tap water is there to get rid of bacteria. The bacteria populations in your tank reproduce fast enough that the bacteria vacuumed out won't be missed.
I also have to disagree with changing the filter pads frequently. Your filter pads house huge bacteria colonies. Getting rid of these colonies will cause your tank to go through a mini-cycle. When you do a water change, simply rinse out the filter pad in the bucket of old water. It'll preserve your bacteria populations and keep some money in your wallet. Only replace the pad when it's falling apart or is so clogged that it can't be satisfactorily cleaned.
Ahh, hmm never knew that. Live and learn! I'll take my humble pie with vanilla ice cream please.