Hi. I just got "Vlad", my new Niger Trigger. Yes, he's hiding - Im ok with that, but is it ok that he's hiding while lying on his side? He gets up, swims for 20 seconds, and lays on his side again. He's a nice vibrant blue, but was black when I bought him. Ni-.25, amm-0, 1.023 grav. 75 gallons...