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The Canister Filter

By: Scott Dahlgren

The Canister Filter


Basically, a canister filter allows a pump to suck or push water through filter media. The advantage largely is due to the ability to increase pressure within the filter. This means that each ounce of water can see a greater surface area while still maintaining adequate volumteric flow rates. Quality canister filters require little maintenance.

For a reef aquarium, canister filters are often overlooked. However, placing aragonite inside a canister filter inline with a reef aquarium increases the amount of calcium carbonate available to the reef. The canister filter provides an excellent method of buffering with little maintenance. Also, special mud can be placed inside the filter to provide trace elements and biodiversity to a reef. However, a canister filter alone won't do the job in a reef aquarium. Volumetric flow rates (GPH) are very low from a canister filter, and other circulation and filtration systems should also be in place before adding a canister filter to a reef aquarium.

For a marine aquarium, certain fish will do just fine with a canister filter and nothing else. The result will be a still, calm aquarium with high water quality. Just make sure to buy fish that don't like current and few enough not to overload the filter.

For the planted aquarium, the canister filter is often the filter of choice. Canister filters do not disturb the surface of the water, and do not mix water with fresh air. Because of this, valuable carbon dioxide and oxygen stay in the water instead of equilibrating with the air. Also, canister filters don't provide strong currents, which is ideal for most plants. Connecting a canister filter to an overflow ensure that the water stays crystal clear.

Atlanta Aquascapes

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