I just started my second attempt at a Diamond Goby and not sure this one will make it either. My first one was dead within 24 hours, I think because he was stressed by the Bangaii Cardinals in the QT with him. All parameters were good and my Bangaii Cardinals did great in my QT for 3 weeks (they are now in the DT). Today I tried again, and my new Goby is acting weird. He swims with his nose straight down at times, kind of like he's trying to go through the bottom of the tank (it is bare, so maybe that's why). I have a bowl of sand with a PVC pipe half barried in the sand, so he can hide, but he has yet to go in the sand. BUT, I did put three pellets in his tank and he soon ate one, and then a few minutes found another one. I just checked to see if the third pellet was gone and it was. He's now laying sort of on his side in the corner. It's his first day in my QT, so mabye he's just trying to settle down. I just wish he'd hop into that bowl of sand and he'd notice he has a really nice hiding place. I'm so worried I'm going to find him belly up in the morning. I did check my parameters again and all is good, and this time around the Goby is in the tank all by himself (and a green star polyp). Lots of prayers are going up tonight.