06-19-2008, 03:35 PM
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Just to throw in my two cents:
The biggest problem with a filter breaking isn't the lack of filtration per se, it's the lack of oxygen in the water that would result. I recently had a power outage that lasted about 24 hours, during which time none of the filters on my tanks were running. It's best to have pattery-powered air pumps on hand for situations like that, as simply tossing an air stone into the tank can help keep the oxygen levels up. However, my fish were no worse for the wear after 24 hours with no filtration. Even if your filter breaks completely, as long as you can get it up and running or replaced within a day's time, I think you'll be fine.
Is there enough room to put both filters on the tank? Why not do so, if you can? That way, even if one breaks while you're not around, you've still got another right there, already seeded. Your Penguin probably has variable flow so if you think there's too much flow with both filters running, you can just lower the flow on the Penguin.