I purchased a 6" grass pickerel online and received it on wednesday. It has not eaten a single bite and just goes back and forth rubbing its mouth on the glass and has rubbed himself raw. It is in a 125 gl tank with a pleco. I have put in live guppies, ghost shrimp .5", minnows .75" to 1", and they are all still in tank swimming around. I have turned off the lights and the room is not well traveled but is lit by sunlight. I believe he is stressed out. I put in aquarium salt to help with his raw lower jaw. Should I cover the tank with a blanket to reduce the sunlight and make him feel more secure, or just wait for him to get accumulated to the new surroundings. I would think that 3 days is enough to get him settled in. I am going to catch crickets and junebugs to see if he is more uset to insects. Any additonal suggestions is will be greatly appreciated. Feel free to comment on my current actions as well.