Ok so bought 4 zebra loaches this afternoon. They were very active and grouped together. Did a water change. Filling my tank back up and all 4 are gone. I know i didn't dump with water cause I used my vacuum is too small to suck them up. Took apart my cannister filter. Moved all my decorations. I know you all are gonna say they are good hiders but I should have seen 1. Oh and no bodies outside of tank either. I think I am going crazy or part of pixar movie. Lol what is going on.