I just bought 5 Neon Tetras, 5 Glowlight Tetras, and two ADF's this afternoon after getting off of work. They all seemed happy and uppity from the start. However, when I shut off the light, they all separate, zip-zapping in different directions, and they totally freak! When I turned the light back on, they schooled back up and started the happiness all over again as if nothing happened. Any ideas what to do? I don't want to turn the light off tonight knowing they are stressed and wake up to find them poisoned by their own fear. However the frogs do need a day and night divide so if I leave the light on, they will get sick. Thanks guys!