i recently bought a 7 1/2 inch male jack i want to breed to pair at that size mite be a challenge..what ima try is buy 1 or 2 females closest to his size as i can altough its hard to find female jacks dat size cause lfs only sell 3 inch biggest...ima do the mirror trick....i havve a 110 hallon with jsut the male in there...driftwood and a clay pot...ima add the females and ill see what happens after they get used to ea other maybe a week ima tape a 4x4 mirror to the tank.so when the male sees his reflection hes gunna start trying to fite his image tinking another male trying take over...this will ...arouse the female and shes going to start picking at him as he hits tha tank reflection...the male will chase the female here and there but nothing serious..after a while the male will get used to the female picking at him and he will turn and dance and lip lock..then theyll start breeding at that point remove the mirror and there u go..i heard this trick works most of the time...problaly my best hope to pairing a 7 inch jack..try it see if it works ill post if i hae success...heres pics of the bad boy