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Yeah, I know. I love mine so much, when I trim em fm one spot. I take the trimmings and start a new colony somewhere else in my tank. Yours r just acclimating. Soon they will all b open and flourishing
They like higher flow areas, so of they're in a low or dead zone they prob won't open. But if they are more than likely they're just acclimating to your lights. And yes they grow like a weed when they're doing good so just be preped.