There are some sites out there that will tell you that a California Stingray can go in a 180. This is really not the best advice and in most every case, will lead the fish to be stressed, not eat well and die.
The California Stingray is a cooler water species of stingray as well, which hasn't been mentioned. They prefer 65-75F temperatures, so you'll need a chiller to provide the proper environment. This cooler water temperature will make it more difficult to find other fish that can be housed with it, as 65F is really too cold for most marine fish readily available in the hobby.
Keep in mind that stingrays can be difficult to get to eat as well.
IMO, if you're absolutely set on having this California stingray, you need at least a 300G tank to even have a shot at long term success. Probably not what you want to hear, but it's the unfortunate truth of the situation.