Others may have had different experiences, but I wouldnt put any plec or "sucker fish" with a bichir, unless its a very active bichir! mine got terrorised by a common plec and when I removed him, my Chinese algae eater decided to chase my bichir none stop. both were removed and my bichir "frankenstein" had a much better life, a combination of poor eye sight and slow movement makes them a sitting target, plus you dont know how your bichir will react, possible leading to the death of that brave plec!