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The Thesvin aquarium descaling filter cartridge is a drop-in water filter for freshwater and saltwater aquariums, turtle tanks and pet water fountains. It combines a PET non-woven structure with high-iodine coconut-shell activated carbon to trap suspended particles, adsorb residual chlorine, remove odours and reduce scale build-up. It is designed for hobbyists, aquarium service companies and OEM/ODM buyers who need a reliable, repeatable fit in existing filter housings.
Fitment is the first thing to check before ordering. This cartridge is built to locate inside the filter compartment of common aquarium filters, canister filters and pet water fountains. The outer profile is formed from PET non-woven fabric, which holds the carbon bed in place and provides a stable surface for sealing against the housing wall. Because the cartridge is a press-fit item, the critical dimensions are the outside diameter, overall length and the position of any locating step or end cap.
Thesvin supports custom tooling and dimensions for OEM/ODM projects, so if your existing housing uses a non-standard size, you can supply a drawing or an old part and the engineering team will match the interface. The goal is a cartridge that seats fully, seals without bypass and can be removed without tools. If you are unsure which size fits your unit, send the model number of the filter or fountain and the team will confirm the closest standard size or propose a custom build.
The cartridge performs three jobs in one pass. First, the PET non-woven layer physically intercepts fine debris, leftover food and plant matter that cause cloudy water. Second, the coconut-shell activated carbon adsorbs residual chlorine (Cl2), chloramines and dissolved organic compounds that give aquarium water an unpleasant smell or stress fish. Third, the carbon bed helps reduce the formation of scale on glass, heaters and pump parts by removing some of the organic precursors that bind calcium and magnesium deposits.
This is a maintenance cartridge, not a biological filter. It is intended to be used alongside your existing mechanical and biological media. For best results, place it after the mechanical stage and before the biological stage so that larger particles are captured first and the carbon is not prematurely blinded. The cartridge is suitable for both freshwater and saltwater systems and for pet drinking fountains where scale and chlorine are a concern.
| Item | Detail |
|---|---|
| Product name | Aquarium descaling filter cartridge / aquarium water filter cartridge |
| Core material | Eco-friendly PET non-woven structure with high-quality coconut-shell activated carbon granules |
| Core functions | Deep filtration of suspended solids, strong adsorption of residual chlorine (Cl2), odour removal, reduction of scale formation |
| Applications | Household and commercial aquarium filters, aquarium water purification systems, pet automatic water fountain cartridges |
| Recommended replacement interval | 2–4 weeks, depending on aquarium volume and water contamination level |
| Quality certification | Production system conforms to ISO 9001/14001 and IATF16949; materials audited to US EPA, NSF and medical supplies GMP standards; 100% safe and non-toxic |
| Customisation (OEM/ODM) | Supported by a 20,000 m² clean workshop and CNAS testing centre; deep non-standard customisation and volume production to customer tooling and dimensions |
Thesvin operates a 50,000 m² production site in Zhongshan, Guangdong, China, including six clean workshops totalling 20,000 m². Cartridge assembly and packaging take place in a controlled environment to limit dust contamination. The quality system is certified to ISO 9001, ISO 14001 and ISO 45001, and the site has held IATF16949 automotive quality certification since 2024. Incoming material inspection (IQC), in-process inspection (IPQC) and outgoing inspection (OQC) cover carbon fill weight, seal integrity, flow and appearance, so that batch-to-batch dimensional consistency is maintained for B2B buyers.
The in-house laboratory is CNAS-accredited and can issue filtration efficiency, dust-holding capacity and resistance reports. Products comply with REACH and RoHS environmental regulations, and compliance documents can be supplied on request. With more than 20 years of filtration manufacturing experience and exports to Europe, the US, Japan and Korea, Thesvin supports OEM/ODM projects covering size, structure, filter media grade, frame material, logo and packaging, with more than 1,000 filtration solutions developed to date. Multiple automated production lines support monthly output in the millions of pieces.
To receive a quotation, please send the following: the device or vehicle model (aquarium filter, fountain or housing), the size or a drawing (or an old part), the airflow or water flow of your pump, the operating conditions (freshwater or saltwater, water hardness, temperature), and the quantity you plan to order. Include any packaging or logo requirements for OEM/ODM. Contact our team and we will reply with a fitment confirmation and price.
The Thesvin cartridge is designed as a press-fit item for common aquarium filters and pet water fountains. Fitment depends on the outside diameter, overall length and locating features of your housing. Send us the model number or a photo with dimensions and we will confirm the closest standard size or propose a custom build.
Yes. An old cartridge is often the fastest way to match the interface. Send the used part along with the host device model and we will measure it and confirm the critical dimensions before quoting. This is standard practice for OEM/ODM projects.
The cartridge combines PET non-woven physical interception with coconut-shell activated carbon adsorption. It captures suspended solids that cause cloudy water, adsorbs residual chlorine (Cl2) and odours, and helps reduce scale formation. Efficiency depends on flow rate and water quality; our CNAS-accredited lab can issue test reports for specific projects.
The recommended replacement interval is 2–4 weeks, depending on aquarium volume and water contamination level. Heavily stocked tanks or hard water may require more frequent changes. Replace when flow drops noticeably or when chlorine or odour returns.
Yes. We support OEM/ODM customisation of dimensions, structure, filter media grade, frame material, logo and retail packaging. Our 20,000 m² clean workshop and CNAS testing centre allow us to develop non-standard sizes based on your tooling or drawing. More than 1,000 filtration solutions have been developed to date.
We provide free standard samples to B2B customers with a clear purchase intention; the customer covers courier costs. Custom samples are developed in 7–10 working days after the solution is confirmed. Standard model MOQ is typically 3,000–5,000 pieces, and OEM custom models are 5,000–10,000 pieces, depending on specification and packaging.
Standard stock orders ship in 7–15 days. Custom orders typically take 30–45 days after sample approval. Multiple automated production lines support monthly output in the millions of pieces, and we can discuss urgent orders and annual framework contracts.
Yes. The production system conforms to ISO 9001/14001 and IATF16949, and materials are audited to US EPA, NSF and medical supplies GMP standards. Products comply with REACH and RoHS, and we can provide compliance documents on request. Contact us with your target market requirements and we will confirm the available paperwork.