Argh what's with all these "rules"!
I've had healthy sun coral for over a year. These are my findings.
- didn't care if it was up top under metal halides, or in a deep dark cave.
- prefered high/med flow.
- did not only open up at night.
- did not need training. mine opened up when I fed my fish.
- when polyps were extended I fed meaty foods once or twice a week with a turkey baster.
- Try to feed all your polyps. Doesn't hurt it. I found the polyps which are fed tend to bud.
- VERY sensitive to freshwater ^.^.
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