My tank is about 2 1/2 weeks old, and going through the cycling period I have a 38 gallon tank, and the "setup" I got with the tank was a Tetra whisper 30. Now reading up on filtration, I see that you want to have a filter that AT LEAST filters the amount of water you have in the tank soooooo I went and picked up a Tetratec pf300 that filters from 30-60 gallons !! But.....do I want to set that up until the cycling period is over??? I don't have a huge problem with the existing one filtering, since it has only been set up for a couple of weeks....or do I need to do it right away ?? ??? ???