UG filters are 'Old School'. They do need to be maintained which means taking it out. The cannister filter should be fine.
Sorry to hear you decided against SW
at this time. But, at some point in the future you will be assimilated. Resistance is futile!
Also remember to post a question here about a piece of equipment before buying it. Good job on reading up on that filter before buying it. Keep it up and you will have a successful tank.