I have been putting them together for about a year and a half. I went to buy some juvies and felt bad for 2 bigger guys in a small tank. The last 2 I got in July. They have been getting along so far. I've only had one get attacked. A couple of them need to slim down. I got them from the store that way. They were living in 10 gallon tanks and must have been fed a dozen goldfish everyday. They should slim down soon. I feed them every 4 or 5 days. The one that's stays to the left at the beginning of the video, I call him Cartman. He is ugly but his food aggression sets the pace at feeding time. The rest now he will eat everything so they step their game up.