Yeah, I've done some research but can't seem to find a definitive explanation. The first few times they did it I just figured it was a random coincidental arrangement. With all the storms this winter I began to notice they only did it either immediately prior to or during a storm. This only started when I arranged my koralia and pumps to all push water the same direction. They all face into the current and swim just fast enough to match the current and stay in one spot. I'm curious if anyone has any ideas as to why they do this or if anyone else has had this happen? Its like they are all lining up for roll call.
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