I have a tank with 8 cardinal tetras and 2 bronze cory catfish. I used to have a pair of dwarf gouramis in with them and while they were in there the tetras were always out and about, not afraid of anything and not schooling. Now that I have removed the dwarf gouramis they hide a lot especially if I move towards the tank. I have two male guppies in another tank I could afford to put in there but I was wondering about a few things. Will the guppies get along with the cardinals? Should I do a male and a female or would it make a difference?