I got this goby about a week ago now an he’s been constantly swimming at the top of the tank. He does take a break and go on the sand bed sometimes but 89% of the time he’s at the top of the tank swimming. I assumed maybe he just has to get used to the tank but it’s almost been a week and he’s not getting any better. And worst of all just 15 minutes ago I noticed he was laying on top of my jet stuck! I tried to whoosh him off but he didn’t budge I basically had to roll him off and then he just floated away with the current. He then started to swim again so I thought he was fine. and then he went straight into the jet again!!! Thankfully he blew away fast enough but still. I’m not sure if he’s hurt or not he’s swimming but he has his tail curled a lot now. I have him in a little quarantine tank now. Any advice?