Clear water. Healthy stock. Equipment built by the people who design it.
Who we are
Guangzhou Cowater Aquaculture Equipment Co., Ltd. is a manufacturer of aquaculture and koi pond water-treatment equipment, based in Baiyun District, Guangzhou, China. We research, design, produce and sell our own machines: rotary drum filters, combi koi filters, protein skimmers, RAS systems, ozone and UV sterilizers, aeration and oxygenation units, fish tanks and hatching equipment.
Our 1,300 m² facility keeps design, assembly, testing and export under one roof, and our 11–50 person team covers engineering, production, sales and after-sales in-house. Cowater is a verified Custom Manufacturer on Alibaba.com — assessed through SGS Supplier Assessment and Onsite Check — and currently ranks as a top-5 best seller in Aquaculture Machine Aerators.
Why buyers choose Cowater
We manufacture, so we answer for what we sell. There is no trading layer between your order and the workshop. Design, production and after-sales sit in the same team, which means faster answers on specifications, faster changes on drawings, and one clear owner when something needs solving.
Customization is a service line, not a slogan. We offer both OEM production and design-based customization. Housing layout, flow capacity, drum mesh, control logic, branding and packaging can be built to your project. Send a drawing, a pond layout or a performance target, and our design team returns a specification you can quote against.
One supplier for the whole water loop. Mechanical filtration, biological filtration, disinfection, aeration and oxygenation, tanks and accessories come from the same source. You specify a system with matched capacities instead of stitching together components from five different vendors and hoping the flow rates agree.
Support that continues after the container ships. Every order leaves with installation instructions and video guidance. For larger projects we provide commissioning support and on-site technical assistance — the capability Alibaba.com independently verified as expatriate engineer service.
Export is our default mode. Around 81–90% of our output leaves China. We quote FOB, CFR, CIF, DDP and express terms; accept T/T, L/C, PayPal and major cards in nine currencies; and hold a standard preparation time of seven days from Huangpu port. Our team handles enquiries in twelve languages, so specifications, drawings and after-sales questions do not get lost in translation.
What we build
Rotary Drum Filters and Combi Koi Filters. Our core line. Stainless steel drums — 304 grade on our combi models — with automatic backwash driven by water level, so the unit cleans itself while the pond keeps running. Combi models integrate UV sterilization and moving-bed biofiltration in a single compact cabinet — the format most koi pond builders and retrofit projects ask for, available from one set.
RAS Systems. Recirculating aquaculture systems for indoor and high-density farming. Drum filtration, biofiltration, oxygenation, degassing and water-quality monitoring are combined into one engineered loop and sized to your tank volume and stocking density — including modular 40 m³ high-density tank configurations.
Biological and Mechanical Filtration. Bakki shower filters, sand filters, MBBR bio media and filter media accessories. Built for the long, boring kind of reliability that keeps ammonia and nitrite where they belong.
Protein Skimmers. For marine systems and high organic loads, removing dissolved protein before it breaks down into the ammonia your biofilter has to absorb.
Ozone and UV Sterilization. Ozone generators, UV sterilizers and combined treatment packages that control pathogens, bacteria and water discoloration without chemicals.
Aeration and Oxygenation. Air blowers, oxygen generators, oxygen cones and aeration diffusers — the equipment that decides whether high stocking density is profitable or merely crowded.
Tanks, Hatching and Aquaponics. Fish tanks, fish egg hatching systems, aquaponics systems and aquaculture accessories for growers building from the ground up.
Where our equipment runs
Koi ponds and hobbyist builds, commercial fish farms, hatcheries, indoor RAS facilities and aquaponics operations. Our buyers are concentrated in North America (30%), Western Europe (20%), Oceania (15%), the Middle East (15%) and Africa (10%), with the remainder in Southeast Asia and Northern Europe. Most are pond builders, farm operators, distributors and OEM brands who need a manufacturing partner rather than a catalogue.
Let’s talk about your water
Tell us the species, the volume, the stocking density and the destination port. We will come back with a configuration, a drawing and a price — and a straight answer on what your system actually needs.
Guangzhou Cowater Aquaculture Equipment Co., Ltd. Baiyun District, Guangzhou, Guangdong, China · cowater-aqua.com
