So I've had a baby copper band for over a month now I will admit a rough 6 days before he ate but for a soild 4 weeks he's been eating mysis a lot , so I though all is well, hooked up the new jebao wr8 its been on wave 1 speed 3 and lower pulse , everything in nthe tank is fine just did a nice water change and always skimming , top off every day etc . He's hasn't been him self at all today , he looks fine maybe on the skinner side . Im on. A brand new pack of mysis and they look bigger then the last pack (same brand) and he really struggles to eat it so I much have to cut the frozen block up more I guess idk.. I doubt he will eat today judging how he's staring at the wall and mouth open. Again nothing seems around his gills and all my other fish are fine , I am very new to cbb and don't know muc other they are picky eaters and size of tank . And not to mention he's a very relaxed fish ( he was added last)