Capacity - 80 Gallons Flow rate 265 GP Hi-tech design filters up to 265 gallons per hour Dual filter elements provide excellent mechanical and biological filtration. Optional included spray bar for powerful aeration Adjustable air regulator allows aeration flow control Mounts easily inside terrarium or aquarium Can be operated in any postion horizontal or vertical Smooth ultra-quiet operation Perfect for odd-shaped and shallow habitats. For best results insist upon genuine Ovation replacement media.