I keep cherry barbs. In the beginning when I first started my main tank I put 6 of them in there and every month or so a little fry would appear out of nowhere. As I redid and redid my system the males perished and I was left with 2 females. As I was wandering around petsmart one day I noticed that they had them on sale for $1 so I picked up 2 males and 2 females and put them in the quarantine tank, thinking that the females would appreciate the company. One week to the day I see a crap-ton of fry swimming in the java moss. So I scooped the adults out and put them in the main tank. I now have 40+ cherry barbs almost ready for market!
Love the little suckers.....