Hi! I'm wondering if anyone can give me some info on urchins. I absolutely love them and definitely want one. I currently have a 40gal breeder with 3 Astrea snails and 2 Bangaii Cardinals. I'm thinking at some point about adding a royal gamma and have no idea what else. It'll be some time before I add anything since I just added my BCs this week. Are there any urchins that would be okay in my tank? It's fowlr now. No corals. I'm not sure if there will be or not. Any stocking ideas and/or urchin info would be greatly appreciated! Thanks