I've had great luck with south american cichlids! In my opinion they are the easiest to breed! The parents raise the clutch and protect the fry so you don't have to seperate the fry from the parents... EVER. Another plus is that most pet stores have their ph at neutral or 7.0. The south american cichlids colors really come out at a 6.2 ph so when you bring these beautiful fish to the pet store to sell they are usually amazed how colorful they are. Jewel cichlids are great! They are red with blue dots and their fins are outlined in hot pink! very colorful and not too big! they sell great at the pet store!