large mouth bass

Heya. I'm so new to this so I'll tell ya a story... Ok, so my son's were doing some voluntary community service (removing debris for our local golf courses canal sobthey could swim) and happened upon a cast net in the muck. Since I have an empty 75gal tank ,I figured I'd take them a bucket and...

i got him out fly fishing and I had to keep him. Had him for a month now and just this week his bottom lip is red from hitting the glass. Any suggestions? He is 5 inches in a 55 gallon