What is the best way to chemically filtrate my aquarium?
I like canister filters because they are so thorough in passing the water through the chemical medium, but many types of aquariums may not need this effective of a filter. Some experts use power filters, some believe in trickle sumps, some people use carbon bags below the gravel, heck, I even know some people who swear by chemically treating their sponge filters. My point is that this is definitely an area of broad opinion, and there’s lots of equipment available to the aquarist. Read up on what’s best for your tank.
