I’m afraid to stock my Walstead tank with anything after reading this. I’ve had many regrettable purchases, but the one that sticks with me are the dozen rosy barbs I put in a 55. They were the long-finned type and gorgeous. But hyperactive. Up, down, left right, zig, zag, EVERYWHERE ALL DAY AT 90 MILES PER HOUR. That was 25 years ago, and I still remember how anxiety producing they were.