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Cultivated Reef

Coral lighting


Reefy

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Keng Yew, Leong

Thats 0.8 watts a gallon.Are you sure your lihting is 8 watts a tube?With that kind of lighting plus a high tank,you cant keep any live corals.Maybe you can try some non photosyntesic(whats da spelling) corals such as sun corals and carnation corals.They need A LOT of feeding.In you tank you will need at least 60 watts of lighting...but the more the better.Try to get yourself a 150 watt metal halide lighting and you will have almost an unlimited choice of corals to keep.Sorry no corals 4 ya....

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watts per gallon:

 

Hate that rule, it's terrible.

 

AS for keeping corals. Sponges, sun corals, some polyps, and many more can be kept.

 

60 watts is not necessary in a 20 gallon to keep corals. It just depends on what kind of corals you have. I'd say if you got 40 watts you could keep all the photosynthetic corals+many mushrooms+ some kinds of polyps

 

60 watts would give you better options, and your corals would definetly like it better if in the right color spectrum (actinincs, 10000k, wahtever)

 

BUT a nice 80 or 100 watt hood would give you plenty of light for all LPS and softies...

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A 20 gallon high hex is going to be a little deep for 40W to get to the bottom (or anywhere near).

 

Light intensity is deceptive, 2 13W bulbs are not as intense as one 26 W bulb. Fewer larger bulbs with give you more intense (= better) lighting for corals. I am guessing you don't have a lot of space for bulbs, so PC's will be your best, cheap option that will allow you good flexibility for photosynthetic LPS and softies.

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