if there's tissue between the polyps, why wouldn't they be able to share nutrients? i feed my sun corals 2-3 times a week, and simply blast brine shrimp towards them and let the fish mop up the rest. i make no effort to make sure each polyp is fed. they 'learn' what time of the day you feed them, and will open up accordingly. it's easiest to use your timed lights as a cue. gently blow brine shrimp juice over the coral when your lights go off and it should begin opening in a few nights. possibly longer, but be persistent.
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