-50% on a selection of fish food
An effective filter stacks three layers. Foams and filter wool trap particles, biological media made of ceramic or balls give the bacteria a large surface area, and chemical media such as activated carbon or zeolite absorb odours, discolouration or ammonium. Water should pass through these layers in that order, from coarsest to finest.
Cut-to-size foams fit most filters, and original replacement foams keep the exact shape of your model. To start up new media, combine them with starter bacteria.
Frequently asked questions
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