I have a canister filter. I removed carbon. Everything is about 2 years old. I clean it every month. Should I rinse the sponges monthly in the old aquarium water I just took out from the water change or should I rinse the sponges in tap water? There are also these "pellet" like things and small tube like things. Should i rinse these or just leave them? As I stated this is a 2 year old filter.