I only have heaters in my sump. No ugly equipment in my tank for me!
Mag drive... those things are like a super-sized maxi-jet. Abuse the heck-out of em... throw them around a bit, they still run. Pull the impeller out, see if its swollen or has some bad ridges worn into it. If it looks shot, order a new impeller,(provided inside the motor housing, its still ok). If it feels messed up inside the main unit you may have to replace, but I'd give it a good cleaning of all the parts and fire it up again. I have had pumps that ran dry many times before... maxi-jets and a mag. They were still fine!
Like Wes said though, good idea to have a back-up on hand anyways.
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No more tanks  - Laying off the ReefCrack for awhile!
Cheers,
Chris
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