Hello team, I have 3 female stingrays 30-35cm, and I got one xb aro 2 months ago and now she is around 20-25cm. When she came she was to small and I put a divider in aquarium so the stingrays don’t eat her. Now could I let her swim freely or should I wait to get bigger? I am afraid more for the pearl cause she is a piggy. The tank is 350g