Blue fish, glad yours is working out! It's very interesting, if more than a bit stressful. And, apparently, dangerous! (if they bite you lol). I added fish 7 a little bit ago--no issues. I held her back from the group because the other day I noticed a small white patch on her side so I wanted to make such it wasn't something pathologic. Staring at it under a bright light it was just pigment (or lack thereof, she's a marble). There is one more that is being held back because she is very thin and seems a little not right, although she's active and eating. I put her qt critter keeper next to Kubla Khan's for a little while (my AB handsome boy HMPK), and boy was he in love lol. He showed off like crazy then build his first bubble nest under his IAL. I've put a paper between them now so no one gets too stressed but it was pretty cute.