Medaka Bio Filter Block – biological filter block for medakaMedaka Bio Filter Block – biological ceramic filter for Medaka bowls, mini-ponds and aquariums up to 50 litres. Promotes beneficial filter bacteria and clear water.The Medaka Bio Filter Block is a practical ceramic filter block specially developed for medaka bowls, small ponds and aquariums. It supports natural biological water purification and helps to create a stable and healthy living environment for Japanese rice fish (Oryzias latipes) and other small aquarium inhabitants.The highly porous ceramic structure provides a large surface area on which beneficial filter bacteria can colonise. These microorganisms play an important role in the biological breakdown of pollutants in the water. They help to break down ammonium, or ammonia, and nitrite as part of the natural nitrogen cycle.Unlike conventional motorised filters, the Medaka Bio Filter Block requires no mains power supply and no additional pump. It is simply placed directly into the water, where it provides a surface for beneficial bacteria to colonise. This is a straightforward way to support biological filtration, particularly in small medaka bowls and natural-looking mini-ponds.The filter block is suitable for water volumes of up to 50 litres and can be used in both medaka bowls and small freshwater aquariums. It is also suitable for tanks containing shrimp and other small fish.With the Medaka Bio Filter Block, you can easily support the biological balance of your aquarium or mini-pond. The durable ceramic block can be gently cleaned as required and can remain in the water permanently.Your benefits at a glance1 biological ceramic filter block includedFor medaka bowls, mini-ponds and aquariums up to 50 litresPorous ceramic structure with a large surface area for bacterial colonisationPromotes the colonisation of beneficial filter bacteriaSupports the biological breakdown of ammonia and nitriteWorks without electricity or an additional pumpSuitable for medaka, small aquarium fish and shrimpsEasy to use and gentle cleaningTechnical dataMaterial – porous ceramicDimensions – 15 × 10 × 2.5 cmWeight – approx. 210 gInstructions for useBefore using the Medaka Bio Filter Block for the first time, rinse it carefully with clear, preferably chlorine-free water and then place it directly into your Medaka bowl, mini pond or aquarium.Over time, the porous ceramic surface becomes colonised by beneficial filter bacteria. These support the natural breakdown of pollutants and help to stabilise the biological balance.Important information on usePlace the filter block completely underwaterPosition it, if possible, in a spot with gentle water movementIf necessary, clean carefully using water taken from the aquariumDo not use soap or chemical cleaning agentsThe bacterial cultures need time to develop sufficientlyThe Bio Filter Block supports biological water purification; however, with an appropriate fish stock, it does not generally replace a high-performance filter or regular water changes.Zoo Roco TipMedaka are often kept in decorative bowls or small mini-ponds, where strong water currents are deliberately avoided. It is precisely in such tanks that the Medaka Bio Filter Block can be a useful addition to natural water maintenance.We recommend using the filter block as early as possible when setting up the tank so that beneficial bacteria can develop.In combination with live aquatic plants, a suitable fish stock and regular partial water changes, a stable biological balance can be maintained.Check nitrite levels regularly, particularly in newly set-up tanks, as the biological filtration process only develops over time.

Worn Wood M – natural aquarium root for aquascapingWorn Wood M – natural aquarium root made from hardwood with a weathered texture. Ideal for aquascaping, shrimp aquariums and terrariums. Size approx. 20–30 cm.The Worn Wood root is an exceptional natural decoration for aquariums, aquascapes and terrariums. Its distinctive, weathered surface is reminiscent of wood that has been shaped over many years by water, sun and wind. This creates a particularly natural look that lends any underwater landscape a rustic and authentic character.With its warm brown to yellow-brown hues and smooth, slightly eroded surface, Worn Wood blends harmoniously into natural-looking aquarium designs. The gently curved shapes, natural indentations and unique wood textures make every root a one-of-a-kind decorative element.Unlike heavily branched root varieties, Worn Wood often has a more compact, sculptural shape. This makes the wood particularly well-suited as a central design element in the aquarium. Whether as a horizontal tree trunk, a weathered river root or a striking focal point amongst natural stones – the design possibilities are endless.The natural wood surface combines beautifully with epiphytic plants and mosses. Anubias, Bucephalandra, Java fern and various aquarium mosses in particular can be attached to the root. This creates harmonious aquascapes where plants and natural wood blend seamlessly together.Furthermore, the root provides shrimps, snails and small aquarium fish with additional structures to explore. Over time, biofilms and microorganisms can colonise the wood, which shrimps, for example, enjoy grazing on.The Worn Wood root is made of natural, dense hardwood. Due to the density of the material, many pieces sink of their own accord after a short soaking period. As this is a natural product, individual roots vary in shape, colour and structure.Measuring approx. 20–30 cm, Worn Wood M is particularly suitable for small to medium-sized aquariums or as part of larger aquascaping landscapes.Your benefits at a glanceSize M, approx. 20–30 cm in lengthMade from 100% natural, dense hardwoodCharacteristic, weathered surfaceWarm brown and yellow-brown tonesIdeal for aquascaping, aquariums and terrariumsSuitable for attaching mosses and epiphytesEvery root is a unique piece of natureInstructions for useRinse the Worn Wood root thoroughly with clean water before adding it to the tank to remove loose dirt particles and any possible residues. Do not use cleaning agents.We recommend soaking the root in a separate container for a few days before adding it to the tank. This allows the wood to become fully saturated with water and ensures that any water-soluble tannins are partially released.Then place the root in the desired position in the aquarium and ensure that it is stable. If the root still floats, it can be temporarily weighted down with suitable aquarium stones.For a natural look, mosses and epiphytes can be attached to the wood surface using suitable plant glue or thin thread.ImportantRinse thoroughly before addingPre-soak for several days if necessaryDo not use chemical cleaning agentsEnsure the wood is securely positioned in the aquariumThe water may take on a slight brownish tinge due to tanninsWhitish biofilms on fresh wood are usually temporaryZoo Roco TipWorn Wood is particularly well suited to natural-looking aquascapes where a calm and harmonious design is the priority. Combine the weathered root with fine sand, rounded river stones and compact aquatic plants to create the impression of a natural stream.Mosses and epiphytic plants such as Anubias, Bucephalandra or Java fern, which can be attached directly to the wood, look particularly decorative.Our tip for shrimp aquariums: After adding the root, allow sufficient time for natural biofilms to develop. Shrimps enjoy grazing on these surfaces and use the wooden structures as additional places to rest and hide.

SF Mangrove Root L – Decoration for aquariums & terrariumsSF Mangrove Root L is a lifelike driftwood replica for aquariums and terrariums. This decoration creates a natural look and offers plenty of hiding places for aquarium and terrarium animals.The SF Mangrove Root L is a lifelike replica of natural driftwood and is suitable for use in aquariums and terrariums. The textured root-like appearance adds a natural touch to the setup and creates a beautiful underwater or terrarium landscape. This decoration provides hiding places for aquarium and terrarium animals. Thanks to its large size, the Mangrove Root is ideal as a central focal point in an aquarium or terrarium. It can be combined with plants, stones, substrate or other decorative elements, helping to make the habitat visually more varied and structured. As this is an artificial decoration, its shape remains permanently stable and, unlike real wood, does not need to be watered. Nevertheless, the root should be rinsed thoroughly with clean water before first use.Your benefits at a glanceLifelike replica of mangrove or driftwoodSuitable for aquariums and terrariumsCreates a natural underwater worldOffers plenty of hiding placesIdeal as an eye-catcher in the tankTextured surface with a natural root-like appearanceCan be combined with plants, stones and substrateRetains its shape and is easy to maintainNo need for lengthy pre-soaking, as with real woodSuitable for freshwater aquariums and terrariumsDimensions249 mm x 310 mm x 370 mmapprox. 1.8 kgInstructions for useRinse the decoration thoroughly with clean water before placing it in the tank. Do not use any cleaning agents. Position the root so that it stands securely and animals cannot become trapped. Ensure there is sufficient swimming space left in the aquarium.Care instructionsIf necessary, the decoration can be removed from the tank and cleaned with lukewarm water and a soft brush. Do not use soap, disinfectants or harsh cleaning agents, as residues can be harmful to animals.Zoo Roco TipThe SF Mangrove Root L looks particularly natural when combined with epiphytes, mosses or small stones. In terrariums, it can also be used as a structural element and hiding place, allowing animals to make use of various retreat areas.

KoiPro Bacteria House 24 pieces – filter mediumKoiPro Bacteria House is a highly porous ceramic filter medium for koi ponds, trickle filters and Bakki Shower. The 24 filter elements provide ample surface area for beneficial filter bacteria to colonise and help maintain stable water quality.KoiPro Bacteria House filter medium is a highly porous, ceramic filter material for koi ponds and garden ponds. The fine pore structure provides a large surface area for beneficial filter bacteria to colonise, which play an important role in breaking down pollutants such as ammonium/ammonia and nitrite. As a result, the filter medium supports stable biological filtration performance in the pond. Bacteria House has a water absorption rate of 80 %. Thanks to the microscopically small pores, bacteria can colonise the material quickly and break down organic pollutants in the pond water. At the same time, the porous structure also acts mechanically, as coarser organic debris is retained and can be further broken down during the filtration process. The filter medium is particularly well suited to Bakki Shower / trickle filters, but can also be used in other pond filters. One pack contains 24 ceramic filter elements, each approximately 38 × 38 mm thick and 160 mm long.Your benefits at a glanceHighly porous ceramic filter mediumSuitable for koi ponds and garden pondsSupports biological filtrationLarge surface area for beneficial filter bacteriaHelps break down ammonium/ammonia and nitriteWater absorption rate of approx. 80 %Can also be used as a mechanical filter mediumSuitable for Bakki Shower and trickle filtersAlso suitable for other pond filtersPromotes stable water qualityDoes not become clogged quickly, unlike conventional mediaContents: 24 piecesDimensions per element: approx. 38 × 38 × 160 mmInstructions for useBefore first use, briefly rinse the filter medium with pond water or clear water to remove any loose debris. Then place the Bacteria House elements in the filter so that they are well flushed or sprayed by the water. They are particularly effective when used in trickle filters or Bakki Shower systems, as there is plenty of oxygen available for the filter bacteria there.Zoo Roco TipBiological filter media work best when they are well supplied with oxygen and the pond filter is running continuously. After initial installation, the medium takes some time for sufficient filter bacteria to colonise it. During this running-in phase, water parameters should be checked regularly.

WIO Wood Sinking Chips Accent 150 gWIO Wood Sinking Chips Accent 150 g are natural wooden accents made from bark, roots, twigs and wood chips. Ideal for realistic details in aquascapes, biotope aquariums, paludariums and terrariums.WIO Wood Sinking Chips Accent 150 g are natural wooden accents for creating detailed designs in aquariums, paludariums and terrariums. The mixture mimics accumulations of wood as found in riverbeds, along riverbanks and on jungle floors. This allows hardscape transitions, the bases of stones and natural drift lines to be designed particularly realistically. The mixture consists of selected wooden components such as bark, fine roots, twigs and wood chips. After soaking or preparation, the pieces of wood sink and can be placed precisely between stones, on slopes or in small hollows. It is recommended to boil the material for approximately 20 minutes or soak it for 24–72 hours before use, and then introduce it into the tank gradually. As this is a natural wood-based material, tannins may be released. In weakly buffered water, this can affect the pH value. Gradual addition and monitoring of water parameters are therefore particularly advisable where sensitive aquarium inhabitants are present.Your benefits at a glanceNatural wood accents for aquascaping and biotope designImitates accumulations of wood in riverbeds and jungle floorsA mixture of bark, fine roots, twigs and wood chipsSuitable for aquariums, paludariums and terrariumsIdeal for concealing transitions and the bases of rocksAdds depth, structure and natural detailsCan microfauna provide habitat and a food source?Sinks after preparationSuitable for natural-looking layouts and biotope aquariumsContents: 150 gInstructions for useRinse thoroughly before use. For use in the aquarium, it is recommended to boil the Wood Sinking Chips for approx. 20 minutes or soak them for 24–72 hours so that they sink more effectively and any initial release of substances is reduced. Then add them in small quantities in specific locations, for example behind rocks, at the foot of slopes or along natural drift lines.Zoo Roco TipWood Sinking Chips look particularly natural when they are not spread out over a large area, but placed strategically in small clusters – for example, behind rocks, in crevices or at the junctions between sand, soil and hardscape. This creates a naturally developed layout without the aquarium looking overloaded.

Me Euca Wood on Slate – Aquarium rootMe Euca Wood on Slate M is genuine eucalyptus wood mounted on a slate slab. This decorative aquarium root is stable and ideal for aquascaping as well as natural-looking freshwater aquariums.Me Euca Wood on Slate is a decorative aquarium root made from genuine eucalyptus wood, firmly mounted on a slate slab. This makes it particularly easy to position the piece of wood in the aquarium, ensuring it remains stable in the desired location. The root is ideal for creating mystical, natural-looking underwater landscapes and lends the aquarium a jungle-like atmosphere. As it is made of genuine natural wood, each piece is a unique, one-of-a-kind item. Shape, structure, branching and colouring may therefore vary from piece to piece. It is precisely these natural variations that make Euca Wood particularly exciting for aquascaping, shrimp aquariums and planted freshwater tanks. The combination of dark wood and a slate slab creates a very natural look. The root can be used on its own as an eye-catcher or combined with mosses, epiphytic plants and other decorative elements.Your benefits at a glanceNatural eucalyptus wood for aquariumsMounted on a sturdy slate slabEasy to position and very stableEvery piece is a unique, natural one-offIdeal for aquascaping and freshwater aquariumsSuitable for natural-looking underwater landscapesA beautiful, jungle-like appearanceCan be combined with mosses and epiphytic plantsA natural structure with a decorative effectAvailable sizesS 18–23 cmM 28–35 cmTechnical specificationsMaterial: Eucalyptus wood on a slate slabApplications: Freshwater aquariums, aquascaping, decorationInstructions for useRinse the root thoroughly with clean water before adding it to the tank. Natural wood may initially cause slight discolouration of the water. This is normal for real roots and can be reduced by soaking them beforehand and carrying out regular water changes. Position the slate slab so that the root stands securely and does not put any strain on aquarium equipment or the glass panes.Zoo Roco TipEuca Wood on Slate looks lovely when planted with Anubias, Bucephalandra, Java fern or mosses. Secure the plants to the root using suitable aquarium glue or fine thread – this quickly creates a natural, overgrown aquascaping structure.