What does healthy fish poo look like? What does unhealthy poo look like and what would cause it? My Endlers have poo, sometimes tan/brown and sometimes pale to white. The browner ones are shaped like a comma, round, and are approximately 1/4-1/2 inch long. The whiter/paler poos are flatter, shaped like a parentheses (not as curved as a comma) and a bit longer than the comma poos. I have never seen a poo hanging off any of my albino cory cats or my ghost shrimp. Maybe they don't go. I feed flake food once a day and freeze dried bloodworms about 4 times a week. Once every couple weeks I will throw in some frozen brine shrimp. I do weekly water changes with good water perameters. I just dosed the tank with Jungle parasite fizz tab for any parasites after I had an unexplained fish death (adult female Endler that had given birth a week before, got listless for a week and found dead one morning).