I have a dilema, I have one rainbow that is black, which I'm assuming is a male in breeding colors. I also have two females (I think they're females) who are fighting over him and chase everyone else off and fight with each other, then gently dance/side-slap with the male. My problem is that these guys are all in a small tank. I haven't gotten the 65 up to transfer the piranha into that, then them into the 30 gallon tank. So, if I hurry up and do the transfers, would it hurt the process of them spawning if I move them into new territory? I was thinking about letting them spawn in the small tank then moving them into the 30 once the fry are free-swimming. Should I get rid of the rest of the rainbows that are getting beat up now, or how should I go about this? I don't want any grief about them being in a small tank, because they've been getting plenty of water changes and live foods and are doing quite well as of right now, I just need to know what is best in this situation.