My male apisto aggassizi recently died and based on advice on this forum, I got another pair last night to add to my sole female, so the new boy has a harem. All is going swimmingly! Each female has staked out a front corner of the tank, each with a nice, lush variety of plants. Neither corner has a "cave," though. I don't really care about breeding, I just want harmony. Do I need to add caves for the ladies to be happy? If so, what kind of cave? I don't like flower pots or coconut halves. If I don't do caves, will that stop them from breeding (which would be fine with me). Any input is appreciated!