I actually am keeping SPS in a 10gal right now and I can tell you that PC does not cut it and this is from experience. Originally i had a small birdsnest and a tiny millie frag under PC for about a week. polyp extension was very little and until i upgraded to my NEP (T5HO) they were not as happy as they could have been. I also tried acro under this lighting and compared to the same frags at the LFS i was getting horriable extension from it. Even when it comes to T5's its all about the bulb selection as well. I don't even think my NEP is enough for SPS anymore. you can keep them but all my frags browned on me and i have decided not to add anything else till my new tank is up and running.
If you want to try it, give it a go but it is not reccomended
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