Filter Basics
Canister vs Hang-On-Back: Which Filter Suits Your Tank
The two dominant filter styles suit different tanks and different owners. A practical comparison across capacity, noise, servicing, running cost and the mistakes each one invites.
How to Size an Aquarium Filter Without Guessing
Filter ratings are printed for lightly stocked tanks. Here is how to read the gallon rating, the flow rate and the stocking level together so the unit you buy is the right one.
