Good thread!! Great idea...let's see, I've made all kinds of mistakes. My first ray I had shipped from florida without seeing the ray first...not even pictures. It came the next day very small and weak with some kind of skin infection. Had no idea what to do having never kept rays before. Looking back I'm sure my filtration wasn't adequate, didn't know what to feed it really. Needless to say, I lost that ray. Was tough because I'd been working towards getting a ray for a couple years, even built the tank specifically to grow out pups. I also got a wild caught ray and didn't know what to do...it was super skinney and wouldn't eat. Luckily some one on here recognized the ray and put me in touch with the person who imported it and they told me what to do. Now he's a hog!