I will only change water (past tense here) if I have animals in the system and parameters are becoming too dangerous. Otherwise I want the beasties to do their thing.
The other issue with water changes in a newly cycled tank is to not disturb your new cultures of bacteria. Another lesson hard-learned by yours truly is to go easy on the vacuuming if that's what you're doing. Go very easy. Best, IMO, is to simply siphon water out and not worry about removing a whole lot of detritus for the first couple of months at least. Just get what's on the surface rather than digging in. Also, DON'T clean the tank sides, just the viewing front, especially if you're having problems getting the system cycled. Remember, all of these bacteria are benthic and need a home.