I set up a 55 gallon show tank on March 4th (my birthday!). In order to cycle it, I removed the filter assembly from an established (0,0,0 test results) tank and set it up in the 55 gallon, as well as the filter that goes with the tank. (The occupants of the 10 gallon tank moved, as well.) I've been testing the water with the API Master Test kit roughly every other day. While the ammonia readings went from 0 to somewhere between 0 and 0.25, the nitrite and nitrate readings have remained firmly at zero. I did one water change this past weekend (one week after setting up the tank) and vacuumed the gravel, and replaced with dechlorinated water. I haven't used Prime or anything else that may skew the test results. Should I be doing fewer water changes until I get some nitrite/nitrate readings? Should I be doing more water changes? I had planned to get some Prime, but I'm not sure I want something to be altering the test results before I figure out what's going on. Thank you for any information!