Unless your bio load is quite small then one cannister filter isn't going to cut it. Thats a big tank. You will probably start to see a build up of ammonia and nitrates. That being said, if you keep the bio load low then it should work just fine until you get some rock in there.
Just remember that if you add the rock after the fish it will cycle. This will raise ammonia, raise nitrates and then probably kill the fish.
Most people do the rock thing first, get your tank stabilized, and then start to add the fish.
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250 gal display tank plumbed directly to my wallet
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