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My pulsing xenia stop pulsing at night.
So the reason they pulse is to get water moving around their polyps, which brings more CO2 for photosynthesis. At night, they can't photosynthesize, so they don't need to pulse.
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90 gallon mixed reef XPS1000SSS skimmer, 2 radions gen 1, tunze osmolator w/ kalk dispenser, 70 lbs pukani, mp40w x2; 1 tomini, 1 clown 2 mandarins. Vinegar dosing, and micro bubble scrubbing.
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