Thread: A New Method of Effective Algal Control?
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  #12  
Old 08/13/2007, 12:41 PM
fishquaria fishquaria is offline
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About a thousand litres or more of water pass through the tray every hour, which means the tray volume which is about 3 litres. Which means that the water in the tray is turned over 5.5 times a minute.