I have a good sized dwarf zebra Colombian pleco who hides all day while my blue eyed lemon bn pleco is out and about (they share the same cave and don’t mind each other. I tried feeding catfish wafers and Algae wafers but he isn’t interested but my bn is. I then tried fresh ghost shrimp (dead) still no avail. Then I tried frozen bloodworms and still not really interested. I’m guessing he does come out at night but probably during the middle of the night. There is a driftwood in my tank for him to rasp on. Any tips or suggestions?