from day one, he was just really unhealthily skinny. When I got him I had a HUGE outbreak of hair algae and he ate all of it, and he was always eating 24/7 and never put on weight. Then, the last two months my LFS was taking care of my tank and he said he saw the same thing, the fish was constantly eating and always looked sickly. Until he passed away. From what my LFS said and what I've read, digestive problems like not being able to process all of that food is a side effect to cyanide.