I wouldn't even try. You will most likely, likely being 95%, end up with 4-5 dead fahakas. My fahaka lives with a common pleco, and 2 arulias barbs. The barbs are lucky because they are too fast to be eaten... yet, and the pleco, well he doesn't have a tail... They as a whole are not the most friendly of fish, towards other fish, and will gladly take down any crab, clam crayfish, or snail that enters their tank. The keepers fingers are not off the menu either. Anything put in the tank with them is living on borrowed time. I have heard of someone keeping numerous fahakas together, but that was 8 and it was in a 800 gallon aquarium.