Modest_Man;3835551; said:My foot long male needs to be isolated from other argentea (male or female), and any fish over ~6" in a 6' tank. He was ok with other fish only when kept in large tanks (220 and 360 gallons). He will hound them relentlessly till death. Smaller fish he just chases off.
Any tank with more than 12" in depth would be minimal for an adult, solo. Too keep tankmates with them I'd say a 180+, and then you'll just have to mix and match till you find one that works.
I agree, and "relentlessly" is the key word. Had my 8" male in a 220 with a pair of pearsei and a pair of syns. He stalked them relentlessly and....well let's just say it didn't work out.