Donfranko,
The SC-60 may or may not work on your 50,000 gallon pool. I would say that if your pool was indoor, not heated excessively, and understanding that you may have to run your pump up to 24 hrs/day, it will not be a problem.
For example, I have a pool with the smallest SC-36 cell that is maintaining 50,000 gallon indoor pool in Canada, no problems.

Remember when we rate the SC-60 cell at 50,000 gallons, this would be for an outdoor pool with a normal bather load and up to 24 hrs/day pump run time.