Im not in the business of selling RBTA's but I can tell you what worked for me. Now one of the people on this forum mentioned that there are two types, one of the types that grow as large as a football or soccer ball. Which in my case I would say the size of a plate. Now when i bought my RBTA 5 years ago, it was very small the size of a ping pong ball and i began feeding it a 1/4 of a raw shrimp every week. It grew to the size of a plate within a year and a half. At that point i began feeding it half of a shrimp once a week. And after two years of feeding it, it split. After that split i didnt want to deal with the hassle of removing it out of my tank since I only have a 29g, so i stopped feeding it. Its still large but not as huge as it used to be. In your case I would suggest to feed twice a week a chopped raw shrimp and they will split in no time, I'm assuming.