i noticed that, just you are mostly getting advice from vincentii.
please do more research before buying a ray.
most rays will outgrow 18" around. even teacups rays. FYI teacup rays, are usually just baby rays that hasn't been properly identify.
i believe all rays are incredibly sensitive, and need constant daily water changes.
also, bass can grow over 24''.
IMO rays and bass are a bad choice for a 120gallon