I have routed them up through PVC in an overflow. Problem is you need a pretty large diameter tube unless you plan to cut the ends off the power cords to feed them through. Even bigger to go through 90s. I would have the exit point well above water level to prevent possible issues.
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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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