Sometimes it's not necessarily just about the filter, that's just one component required for a balanced system. The biochemistry and ecology within the aquarium itself is just as, if not more, important. Achieving a balanced system can take time, and I think that's often overlooked. Balance also provides robustness, and increases a systems ability to deal with disturbance.
This is because a mature and balanced system contains a diverse community of organisms, and more importantly for us as aquarists a diverse community of microorganisms. These will be in dynamic equilibrium and the community that developed in the last aquarium will not necessarily suit this one since the conditions maybe different and therefore it needs time to adapt. So I'm not sure excessive water changes will help much. Either way definitely take @John q
's advice and use a dechlorinator.