Like a box filter, but cylindrical (some are cube shaped) in shape. Most canister filters are pressurised closed vessels. Inside, there are a series of baskets which water flows through. Canister Filters are sold, complete with mechanical and biological media, some have a UV Light. Most Canister Filters have an inbuilt water pump as well.

Canister Filters have a maximum flowrate stipulated; however, we do not recommend a Canister Filter for Tanks / Ponds with Goldfish or Carp as the amount of waste excreted is too much for a Canister Filter to cope with.

All Filters have a maximum flow rate stipulated.