Feature:?This undergravel filter consists of interlocking plates which give flexibility in use?Numerous perforations provide a huge surface area- allowing bacteria to breakdown the ammonia to less harmful nitrates?Acts as a biological and mechanical filter?All models require a suitable air pump or powerhead for effective operation?Smaller models have a single riser tube- larger models have 2 riser tubes?The gravel or sand must NOT be coral sand- crush corals- etc.- unless your setup is Marine or for Hard Alkaline water fishes.?It can be assembled freely-it depend on your fish tank size.?After setting up an undergravel filter- your tank water MUST be crystal clear in 12 hours. If not- your filter is not working. Your pump may not be working properly.Product Attributes: Model:UF-28P Thumbnail Model UF-12P UF-16P UF-24P UF-28P UF-32P Size 14x7cm (5.51x2.76Inch) x12pcs 14x7cm (5.51x2.76Inch) x16pcs 14x7cm (5.51x2.76Inch) x24pcs 14x7cm (5.51x2.76Inch) x28pcs 14x7cm (5.51x2.76Inch) x32pcs (Suitable for the tank ) 18x12Inch 24x12Inch 32x12Inch 40x12Inch 48x12Inch If you want to chooswe the other model.Please click the Model number.Package Include:1 x Boyu JAD UF-28P Undergravel Filter Note:1.Due to the light and screen difference- the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.2.Please allow 1-5mm differences due to manual measurement.Can be connected together freely according to the size of your fish tank The Pipe Tube can be adjustable high
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