I am thinking of getting a ray that can go in my 300 gallon with the tankmates listed on my sig. What type sure I get???I want to get one ray for a nice big bottom dweller. Ive kept fish for over 25 years and I've never had a stingray.I only keep tetras and barbs. A few years ago I got into preadtorys.So any help would be great.What do freshwater rays look like in a big tank???So any help and pics would be great.Alex.