Welp I am having the same problem I did a few months ago with my old clowns. They look great and happy for weeks, eat well, all that, then suddenly at night turn extremely pale and act crazy. They start swimming into everything and then lay on the bottom and by morning are dead. Nobody I have spoken to has experienced this and it only happens to the clowns. I just aimed a powerhead up to get a bit more oxygen in case that will help but I know he will be gone shortly. If anybody has a guess why this happens please let me know. I've gone through probably $200 worth of clownfish and this happens every time. I feel so bad because it's a lot of money and I can never find the problem
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