Use red and blue LED grow lights. There are hundreds of different ones available on Amazon for .99 and up.
Check out my Inexpensive ATSs anyone can build thread for more info and ideas. http://www.reefcentral.com/forums/sh....php?t=2687243
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240G mixed reef, 29G SPS/LPS clam tank, 50G mixed reef
Current Tank Info: 300g mixed reef, 50g cube
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