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400w mh
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  1. General Reef Discussion
    I'm going to re-configure my 47g column tank. Adding some badly needed equipment. and try again! Fist attempt ended bad. Never mind why.. My question is could I use 400w mh on my tank. The tank is 20" x 20" x 30". I of coarse will make it a canopy with cooling fans ect. How far above the water...
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