Work Well First and foremost, canister filters are great at removing particulate matter from the tank. This alone makes them a great choice, especially if you have a tank that’s 40 gallons or more.

Designed for tanks up to 1500 litres, this high-capacity canister filter delivers impressive water clarity with multi-stage filtration that removes debris, chemical impurities and harmful toxins.

For example, a common 20-gallon tank needs a filter with a flow rate of 80 gallons per hour. It’s better to get one that’s slightly more powerful than too weak.