I just got my fluval 405 and want to set it up. Currently I have a whisper 60 hob. I know to leave it for at least a month or so till my fluval gets the bacteria build up in it. Now my question is. It came with carbon and it comes with bio max for the bacteria. Do you guus recommend I use the biomax and if ibdo how often would I change it or do I just rinse it once a month in syphoned water when I do water changes.