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Old 05-01-2012, 08:14 PM   #1
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Newb question - sump vs canister filters

I have heard that canister filters produce more nitrates than sumps. I'm running two canisters on my fowlr setup.

Any gurus out there that could explain why a sump is better than a canister or could you point me somewhere that highlights the benefits? I trust they are better but I am wondering why. I found a used sump/return pump/overflow/skimmer combo for $160. I want to make sure I get enough bang for the buck vs 2 canisters.

Thanks.
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Old 05-01-2012, 11:34 PM   #2
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I think I've found some answers. I'm still not sure why canisters build up nitrate and sumps do not.
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Old 05-02-2012, 02:55 AM   #3
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It has to do with the keeper's laziness to clean out the canister when needed. Sumps are so much easier to clean IMO because it requires less time to clean.
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Old 05-02-2012, 04:59 AM   #4
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Canisters build up detritus in their substrates over time without proper/regular maintenance. Over time, without proper cleaning, they house and produce nitrates when the filters should be removing it.

A sump on the other hand, isn't really a filter....just added space/volume to house other filters (a skimmer, more LR rubble etc).

Personally, a sump with a few compartments to house LR rubble, and another for a skimmer is hard to beat. They're much less maintenance than a canister filter imo.
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Old 05-02-2012, 08:58 PM   #5
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Thanks for the details. I will eventually upgrade to a sump. Tank is recently cycled and the fish are already stressed. I will give it a bit to let them get in the swing of things first.
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