Biological sand as a fluidised bed sand filter.
Maximum sizes: 100mm x 100mm x 430mm, including pump stand and lid.
Reaction tube: internal diameter 62mm.
Reaction tube: total length 330mm.
Reaction tube total volume: 0.9 litres.
Reaction tube usable volume: 0.7 litres.
Supplied complete with 680 litre per hour water pump.
240 volt, 50Hz, 11 watts.