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Sizes: 20 (for 5-20 gallon aquariums), 30 (for 10-30 gallon aquariums), 50 (for 20-50 gallon aquariums), 70 (for 40-70 gallon aquariums), 110 (for 60-110 gallon aquariums).

Sizes: 20 (for 5-20 gallon aquariums), 30 (for 10-30 gallon aquariums), 50 (for 20-50 gallon aquariums), 70 (for 40-70 gallon aquariums), 110 (for 60-110 gallon aquariums).

Penguin Power Heads deliver constant flow with fully adjustable aeration and increased surface agitation, and they remain silent at all times. The custom air valve regulates air flow, the air filter eliminates noise and dust, and the intake strainer keeps debris from fouling the impeller. Safe in both fresh and salt water applications.UL-listed, CSA available.Epoxy-sealed, moisture-proof motor and electrical components ensure safe operationUnique mounting dystem--adjusts to any demand, bracket and suction cups expand mounting optionsAdjustable flow diffuser and aeration valveDelivers ideal surface agitation and maximum oxygenationModel 660R includes a prefilter sponge (replacements sold separately) to catch large debris in the water before it goes into the pump and reverse flow kit (doesn't provide surface agitation in reverse flow).

Designed specifically for use in Hagen's Fluval Canister Filters, these Foam Blocks effectively strain particulate waste, so that it doesn't clog the other filter media in the module stack. Its primary purpose is mechanical filtration, but biological activity will also occur within the pore structure. Rinse foam monthly in aged aquarium water and replace when the pore structure begins to break down.

Designed to fit Fluval canister filters 104/105 and 204/205. These extra thick micro-fine polyester pads capture micro particles as the water passes through. Use when cloudly water occures or after tank maintenance for crystal clear aquarium water.Effectively traps micro particles and debris.For crystal clear aquarium water.For freshwater and marine environments.To use, rinse pad thouroughly before inserting in filter. Place pad in the last chamber, above the BioMax media (sold separately). Pads should be changed every 7-10 days (or sooner if pad becomes clogged and filter's flow rate diminishes).Comes three pads per package. Each pad measures 5.5""L x 3""W x 1.25""D.

Designed specifically for use in Hagen's Fluval Canister Filters, these Foam Blocks effectively strain particulate waste, so that it doesn't clog the other filter media in the module stack. Its primary purpose is mechanical filtration, but biological activity will also occur within the pore structure. Rinse foam monthly in aged aquarium water and replace when the pore structure begins to break down.

To keep your Duetto Multi-Filter working efficiently, you'll want to replace the accessories as needed. Accessories include the Pre-Filter Sponge and Biological Filter.

To keep your Duetto Multi-Filter working efficiently, you'll want to replace the accessories as needed. Accessories include the Pre-Filter Sponge and Biological Filter.

To keep your Duetto Multi-Filter working efficiently, you'll want to replace the accessories as needed. Accessories include the Pre-Filter Sponge and Biological Filter.

To keep your Duetto Multi-Filter working efficiently, you'll want to replace the accessories as needed. Accessories include the Pre-Filter Sponge and Biological Filter.

To keep your Duetto Multi-Filter working efficiently, you'll want to replace the accessories as needed. Accessories include the Pre-Filter Sponge and Biological Filter.

Functions like a natural ecosystem, providing even filtration and flow through the entire gravel bed. Gravel-Guard prevents gravel and fish from getting below the filter plate. Fishguard keeps fish out of lift tubes.