I am not experienced with another fish but make sure your bottom feeder not sick and contaminate whole tank. I am not sure what is bottom feeder normal behavior should be. If you have him for long time and he been like that i guess it fine, but if you just got him and he is like that then find out if it normal behavior. Let me know if you need any help, i can ask someone on this forum that i know. She is knowledgeable and will be happy to help. Just make sure you still vacuum the gravel and do weekly 50% water changes, and filter media rinsing in the old water with the water change....Sorry for telling you that, it just some people don;t realized that they need to do all of that.
Anyway thank you for response and let me know if you need any help
Anyway thank you for response and let me know if you need any help