I recently purchased a used 50 g. high tank for 20$. I normally keep CA Cichlids, but decided to start an Angel tank. I have one currently about 4" in total size with 2, about 1" Tiger Barbs. Do I have room for 1 or 2 more Angels, or should I just get some Neons and leave it as is? I know a 50g. is still considered quite small on this particular site.