No tankmates. Planted tank with something to lay eggs on, piece of slate, rock, driftwood etc. lower pH the better but don’t chase pH, they will reproduce in any water. I was breeding in 7.5 water. Tank size 10 gallons for a pair is fine. I bred them as well as German blues in a 5 gallon for a long time. For kribs I always put 3:1 females to male if I had the room (20 gallon). When a pair establishes remove the others to reduce aggression. If they stop reproducing for a bit, reintroduce one of the other females. Like most cichlids, don’t expect first few batches to produce fry. Pic showing some infertile eggs from a spawn I had.