I think your ready, its just your tank is to small for even the smallest of all rays. You should check out www.Glassscages.com. they have amazing tanks. Im looking at a tank that is 4ft. by 4ft. by 25 in. which gives a ray a lot of floor space. And it is 240 gallons. Also you should check out www.freshwaterstingray.nl, for more info.