I have a 60g tank currently with 5 total fish (4 yellow labs and 1 female Salousi). I have been running the tank in total for about 7 months and have had fish for about 3 months. My quesion is, since this is my first canister filter, how often do I need to take the filter itself apart? My tank is staying clean. I do about a 25% water change every 7-10 days and a 50% cleaning once a month that includes the substrate and walls and algae. Just want to check and see if I need to be taking the filter apart on some frequency. Thanks.