Minimum hours of light corals need to live?

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My 24G is fully cycled, inhabitants so far is only a serpent starfish. Unfortunately I haven't been able to get a CUC yet (No stock available in JHB)

I noticed there were some diatoms in the tank, and now a bit of growth of green hair algae. I have aquiPHOS in the rear chambers, and I thought the best way to combat this algae before it gets a foothold is by reducing light?

I want to know, how much light will my coral need to survive?(Frogspawn, Mushrooms, and palythoa type polyps)

I also bought some marine snow (which I have not used yet) that I could possibly add to feed the corals while the light is reduced.

Any advice?
 
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Thanks. Should I also "feed" my corals with marine snow? Will this help?
 

viper357

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Personally I wouldn't feed with Marine Snow while you are battling with algae, you run the risk of increasing your nutrient levels thereby fuelling your algae growth. The corals you listed in your first post do not need feeding, they will be quite fine.
 

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