Well to start I'm in my research phase on rays. While I'm building a new indoor pond for my 5' alligator I've decided to spend some time researching housing rays. I've been reading all I can and would like some opinions from expierenced people. I've decided I will house the rays I eventually get in a indoor pond as I've built many for my crocs over the years I'm familar with construction and I think its just fair to give the ray as much room as I can. With that said, my first question is whats the feeling on depth for rays? I've seen everything from 12" on up. Would 12" be good with large footprint or do the rays prefer deep depths to "play in"? The pond will be liner type with no substrate. I personally just like how the rays view from above on a black background. I've seen many opinions on what people think are the hardy rays to keep. What are some expierenced opinions? How many rays could I keep in say a 14'x5'x12 to 24" deep pond? What types of rays cohabitate together well? Would it be ok to do a fishless cycle to pond to get bio-load up to par?(I dont see why not but thought I would ask.) Sorry for all the questions but I'm just trying to learn all I can. I have many more questions but I thought we could start with these. Thanks for any info.