The PF601 is the third model of the 5th generation fluidised calcium reactors and is suitable for aquariums up to 2000 lts - 444 imp. gallons - 528 US gallons normal stocking and illumination.The 5th generation models now have a new design of aquabee pump to prevent wear due to the abrasive nature of the water and media in the reactor.FeaturesLike the previous version this model is fitted with sponges at the top and bottom of the reaction chamber to prevent the possibility of the fluidised media from entering the pump. The whole lid assembly removes via a bayonet fitting to allow easy access to the media for filling or cleaning of the reactor.SpecificationTechnical Data:New 5th Generation Fluidised Calcium ReactorIntegral CO2 bubble counterProbe holderNon return valveOptional solenoid valve available with 2mtrs of cableMedia volume 8.7kgFootprint Dimensions:240mm x 180mm x 610m (LxWxH)9 1/2" x 7 1/8" x 24"mm (LxWxH)Suitability:Heavy Stocking and High Illumination - 1350 lts - 300 imp. gallons - 356 US gallons*Normal Stocking and Illumination - 2000 lts - 444 imp. gallons - 528 US gallons**For fluidized calcium reactors to achieve the stated capacities, Rowalith media is recommended.