A compact fluidized-bed biological canister filter, suitable for all types of aquariums up to 250 gallons. The resealable canister design includes an integral flow regulator to optimize the fluidization and a non-return valve to prevent back- siphoning of the media in the event of a power failure. The unit can be completely disassembled enabling easy access for set-up and maintenance.

• Installation options: Hang-on or freestanding external filter, in aquarium, filter compartment or sump.
• The Merlin requires a pump rated at 150 gal/hr, 5ft. head pump (not supplied with the unit).
• Capacity - over 20 times the filtering capacity of the same volume trickle filter.
• Efficiency - optimum availability of oxygen, ammonia and nitrite to the nitrifying bacteria maximizes the total conversion from ammonia to nitrate.
• Response - at least 35% faster than a trickle filter with 5 times the volume of filter media in total conversion of ammonia to nitrate.
• Constant motion-ensures a thin bio-film (bacteria colony) and prevents build up of detritus that can cause clogging (channeling effect) and anaerobic areas.