I assume you mean a Royal pleco. There are a few species that go by royal pleco, and they grow to different sizes. A picture or L# will fix that mystery. In general they are relatively slow growers. Driftwood is a must, and lots of veggies, and fruit, with occassional meaty foods. Good cave or hiding spot is also needed, but if you get a good piece of driftwood, that will take care of the cave.