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Wet-dry & Sumps
Wet-dry or sump filters are large filter systems for the bigger aquariums. These are similar to canister filters in that they are positioned under the tank and operate on a siphon and return powered by a pump. They also require an overflow or plumbing-ready tank for proper operation. The sump area can contain additional equipment such as heaters or protein skimmer reducing visible equipment in the aquarium.
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