Alright guys and gals i may have jumped the gun and bought a half banded spiny eel, thats what i believe it is after soing research online, from a fish store. Will my eel be fine in my tank if i only have regular imagitarium gravel. He/she seems fine with it and is able to burrow in and out no problem so far, but i read that if i dont have sand it cam be dangerous for him. Is this true? Am i fine? If not any recomendations on how to swap it out? I was thinking if i had to swap one side of tank now and try to do rest later so as not to disturb the BB too much. Or leave a small layer of the gravel under the sand so some of the BB will remain.