in my opinion gourami are not a beginner fish. I also think the freezer method is probably the best.I have read that humans actually feel warm and cozy when they get close to death in freezing conditions, I think this is why they try to keep you awake under such circumstance, no one has died and lived to tell which is the best way to die which means this conversation is going nowhere,which means do it whichever way makes you feel less guilty.