I've had my Pleco for 4 1/2 years. I was told by the store he would only get to be two inches long but of course I learned the hard way that is not true. Even though I love hime dearly, I have recently been searching for someone with a larger tank to give him to since mine is only 20 gallons and I have no room or money for another tank. However, while out of town this week, my niece was taking care of him. She wrote me an email and said he was depressed and missed me. When I got home he was fairly sluggish. I also noticed he was not pooping normal. (I think she might have overfed him. My routine has been in the morning I give fish flakes (there are three small neon tetras in the tank), early evening more flakes and an algae wafer for him and then before bed a "treat" for him such as tubifex worms (his favorite), krill, etc. He has never liked veges. ) Yesterday he took a turn for the worse so I went online to get some advice. I put epsom salt in the water as a muscle relaxant in case he was constipated. He got even worse in the afternoon - laying on his side, not moving. Today he is the same, plus now has not eaten for two days. What should I do? Should I try to feed him? I do not want to prolong his suffering. It is so hard to watch. Any advice would be appreciated. Thanks.