And don't get the opposite JD to make a pair the 160 we picked up for my buddy had Mono Argentus 6", Snowflake 18", Full grown Pair of breeding Dempseys 5" and 8", And the pride of the tank WAS an 18" CLown knife.. The JD's Killed it over night after they fry hatched... The guy had the tank specifically for the KNife and so he sold it to us for real cheap out of spite at the JD's. They also kiled a red ear slider two days before we picked it up!! Other than that my opinion would be GO for iti want to know can i put a Clown Knifefish in a 160 gallon tank with an oscar and a jack dempsey