Twin spots do best in pairs but are still difficult to raise, they will eat most of the pods in a few weeks and must be fed live pods on a continual basis. You will need to add new load every two to three weeks. I had a pair of gobys that I kept for more than a year and they did very well, however the cost of keeping them alive was enormous; about $40 per month. Good luck, they need and eat a lot of food-some time you can get them to eat small particle of good dry pellets as a suppliment not as a ongoing source of food.