I have a 10' long 375 gallon tank that is empty and I have been kicking around the idea of a ray tank. I have had saltwater tanks but when the economy took a dive I shut down my 150 and sold all my fish, but kept my 45 quarntine tank for some fish. I want to get my big tank set up but the cost of saltwater changes is making me think of going freshwater again. I love the colors of sw fish but my pocket book is causing me to think again. If I were to get a fw ray what kind and how big of one, and i would want some fish to go in there also, so what fish could i put in there with the rays?