have added new coral to tank

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When I first started keeping clams I started with 175watt MH with 10k Hamilton bulbs; that was perfect for derasa but the blue crocea and maxima faded. I upgraded to 250watt MH with 10k XM bulbs and the color came back on the crocea and maxima but the derasa faded from too much light.

I think all animals have an idea light requirement, anything more or less and color and health suffer.
 
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