This is my problem as well . The sub with the most aggressive ban hammer is complaining about censorship . He should have just banned them all I guess . The sub really is an accurate reflection of its topic . <| sep |> I guess what I meant is that I ' d expect heros to have stat scaling in line with what their supposed to do . but i also haven ' t seen how their changing the values so that could be a moot point anyway . <| sep |> Just got this book through the mail today . Can ' t wait to read it . Heard so much about it over at rfantasy . <| sep |> Are there strong light sources nearby the tank , possibly shining light in from the side ? See the dorsal light reflex . This would be my guess on your buddies ' fish since all six tetras do it . Tetras are generally very light sensitive since many are black water fish . I doubt that ' s OP ' s issue though since it ' s just a single fish doing it .