My NEWBIE experience after 8 hours:
I picked up my first true perc about 2 weeks ago. It is the only fish in the tank as I have finished my cycle at 5 weeks. He has "hosted" the top right corner of my 75G since he was introduced to the tank. He will not go 6-8" beyond and no more than 4" down. I have been feeling sorry for him for the last week. So I purchased a second True Perc today. After the 2 hour aclimation, I dropped it in. The first was about 1.25", the one I purchased today was about 1". They got along GREAT. I fed them about 2 hours after the second was intorduced. The wandered around the WHOLE tank for another hour before the LEDs came on. Then the fight was on. The new clown wouldn't leave the old one alone after the lights went off. So they went at it. Locked jaws for a split second and kept going round and round. The old clown always slept at the top of the tank. If I didn't know better, I would have thought it was dead. Anyway, I unplugged the LEDs and turnd off all of the adjasent room lights. They are both sleeping 8-12" away from each other at the surface of the tank.
I can't wait to see what happens tomorrow!