Hello all, I recently lost both of my plecos. Within 3 days of each other. I removed the bodies immediately. I can't figure out what killed them. Thier tankmates are 4 baby angels (1.5 inches), two baby ornate bichirs (2.5 inches), a baby black ghost knife (2 inches), and baby five clown loaches (3 inches). One pleco was a longfinned bristlenose, and the other was a blue phantom. The longfinned was about 2 inches and the blue phantom was 4.5 inches. The bristlenose died first. Water parameters: Ammonia - 0.0, Nitrite - 0.0, and Nitrate fluctuates between 3-5. I do weekly 30% water changes and monthly 60%. I fed cucumber and spinach everyother day, and sinking pellets and bloodworms every day. All other fish are lively and active. The bristlenose seemed fine then he was just dead one evening. The phantom acted a little strange, he normally stayed on the bottom but was up high recently. Any ideas? I hope to prevent this in the future, thanks for the help!