I'll be converting a 20g to saltwater by next summer. I've got it all planned out. It'll be clownfish. I've never had any saltwater fish, and clownfish seem to be the best option for getting my feet wet. Which is better for a beginner to saltwater? I've read that the True Percula is smaller, but other places I've read a pair would be to much for a 20g. From the same site, the Ocellaris would need to be a pair for a 20g. My LFS can get both in, and when I asked they'd mentioned being able to get in varieties that I've never heard of. I'm not gong to get any fancy ones, not worth it if something goes wrong during the learning process. I'd prefer a regular or misbar, the tank is planned to have black sand and white rock. What are the differences in personality? I've read that the true Percula is more aggressive, and the Ocellaris is more curious.