Hello all- Im pretty new to this hobby and im not gonna lie, im getting hooked on it pretty fast, but I just have a few questions because I want to make sure that Im doing the right things when it comes to my tank- I have a 20 high with heater, filter, air stone, etc. Right now all i have in the tank is 5 barbs, because the guy at the aquarium center near my house told me that they would be good fish to "cycle" with, Had i known that I could cycle without fish, I wouldve went that route. Anyways, ive had the fish in the tank for about a week now, and ive been keeping an eye on the ph level, and the ammonia levels both of which have stayed the same for the entire week. The ammonia is reading 0 ppm, and the ph is 7.6. The fish seem happy and are eating on a regular basis. Should I start doing water changes? or should I wait for the ammonia levels to go up a bit first?? and as for a nitrate/ nitrite test kit, thats coming tomarrow. Is there anything else I should be watching out for, and or doing...once again I appreciate the advice--