T-5 Effectiveness

xabo

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Are 80W T-5 bulbs (Blue+) effective mounted 12" above the waterline?
 

Usctom

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How deep is your tank?

I have mine mounted around 16" above the waterline but I have shallow frag tanks.
 

JohnMzreef

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I have a 24" deep tank and recently raised the fixture from 8" to 12". (better access) The PAR reduction seems very significant.
 

Bpb

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Having run t5’s high up (36” from the sandbed, 24” from the top most coral) I wouldn’t recommend such a high mounting height. I’d sooner mount them closer to the back of the tank and lower down at 6” above water line. Which should allow your arm to fit in
 

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