Just picked up a couple of Oscars (one tiger and one albino tiger) from the lfs and just let them out of there bags into my 90 gallon. They seem to be hanging out at the bottom of the tank swimming around a little bit exploring their new home. I turned on the light to take a look and they almost seemed to cower in the corner of the tank so I quickly turned off the light. Is this normal? How long should I be waiting to turn the light on? I was thinking about waiting till tomorrow. What do you think? Thanks for any help.