From what I understand SPS are often propagated under 55-6500k light for faster growth rates then moved to 20000k lighting to color up before selling. It might be that the tower color temp bulbs are encouraging the growth, but I don't know if you're getting as much benefit from the party bulbs as you could. I'm interested in pics though, I have a multitude of tanks lying around and love pushing the normal limits of reefkeeping. sounds like a cheap and fun experiment.
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