I dunno know if you could keep many SPS corals under a 70watt. I've seen people keep SPS under 250, but it seems to get them to grow you need 400 watts... But if Bob is saying keep SPS under 70 watts, who am I to tell him he's crazy - being the seasoned pro that he is. I guess if water is tip top, you'll be okay. Someone is the US was keeping a maxima clam under 32 watts of CF lighting and it kept it's color, so who knows?
-Pauli
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Have a good one!
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