Actually - there may be a slight problem in keeping Cali Swell Sharks & Cali Horn Sharks together.
That problem is that the two species seem to have slightly different temperature preferences - based on recent scientific studies. Which show that while the population of Cali Horn Sharks seem to be on the increase in Southern California waters - the Cali Swell shark population seems to be on the decrease. It's that the main reason for this - is the influx of warmer water temps in the area. Horns seem to prefer the water temps - while Swells are less tolerant of water temps in the 68-72F range(20-22 C).
And yes - stingrays usually need to be feed on a daily basis.