So I came home and saw my prized L600 laying on its side/back. So I went up to the tank and the pleco instantly layed back on its stomach. Tested the water and pleco looks fine now. Should I be worry?
My plecos lay in weird ways too. I wouldn't be worried as long as your water conditions are fine. If I had a dollar every time I did that same thing you did, I would have quite a few dollars
No need to worry, plecos lay in funny positions all the time. When they are not doing well they actually lay flat on their stomachs, out in the open, and breathing irratically.