Ok, so I might finally be able to put my acan's back into the main display tank, I had a bicolor angel that was eating them and I finally caught him. I used a plastic bottle and once he felt safe enough going in and out, I was able to sneak behind the tank and swoop down with a net and trap him in. I also had a peppermint shrimp that might have been eating some, he was captured earlier and now living his life behind bars in the sump. Off to the LFS to trade him in :)