You do not need 24/7 lighting! In fact, The preferred method is a reverse of your daylights. When daylights are on, Fuge light is off. When daylights go off, Fuge light comes on.
Preferred this way because it helps to stabilize PH which generally tends to fall when lights are out.
Also, Avoid Caulerpa. It can go sexual and take over everything including your main tank. Stick with Cheato.
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I wonder how much salt mix I would need to turn our in ground pool into a Reef. 
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