Go
 

Why does the light on a refugium needs to be on at night instead of at the same time as the lights on the main tank? Is this so the macro algae is growing at night?
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medical marijuana grow

It doesn't require that. It's often done that way to encourage an opposite photosynthesis cycle to minimize pH swing in the system.

Go
 

thanks. Makes sense now
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ultimate fighters

if you go that route and the fuge is near the display, you also have to consider light spilling into the display. just a thought.

Go
 

My fuge will be in the sump in the stand so light spillage isn't an issue.

I just didn't understand the cons of putting the main lights and fuge light on the same timer. I'm always looking for the simpler option.
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ZR550B

You should read this, maybe twice if you want to remember even half of ithttp://reefkeeping.com/issues/2006-10/rhf/index.php