| Select CFM to View Specs | ||||
| Model | Power | CFM | Voltage | Warranty |
| --- | --- | --- | --- | --- |
All models: 60Hz | Oil-free | Overload sensor | 24-hour continuous use
Ships in 24 hours
Free Shipping
30-day returns
Support team
Reliable Subsurface Aeration for Healthy Ponds – OX-Gen air pumps deliver steady, efficient airflow to support bottom-to-top water circulation, increasing oxygen levels for healthier koi ponds, water gardens, and freshwater features.
Improves Water Quality Without Chemicals – Continuous aeration helps reduce thermocline, break down fish waste, speed organic decomposition, and bring debris into suspension so filtration systems can remove it—no chemicals or in-water motors required.
Year-Round Pond Protection – Keeps water moving during summer to deter mosquito hatches and maintain oxygen at deeper, cooler levels for fish. In winter, helps maintain an opening in the ice to release harmful gases and protect fish and structures.
Oil-Free, 24/7 Performance with Built-In Protection – High-efficiency, oil-free design with overload sensor prevents burnout and supports continuous operation. Easy to install, simple to maintain, and backed by a 2-Year Manufacturer’s Warranty.
Half Off Ponds Product
[ ▶︎ ] YouTube: @halfoffponds
OX-Gen diaphragm aeration pumps deliver reliable, energy-efficient performance for koi ponds and water features. With outputs ranging from 1.24 to 5.3 CFM, these oil-free pumps circulate water from the bottom up—increasing oxygen levels, reducing thermal layering, and filtering suspended debris without chemicals or in-water motors.
Key Features: Oil-free design • Built-in overload protection • Energy-efficient operation • Built for continuous daily use • Quiet, reliable performance.
Aeration keeps water moving and oxygen levels high, supporting fish health throughout the year. In summer, it brings oxygen to deeper zones where fish retreat from heat. In winter, it keeps a hole open in ice for critical gas exchange.
Additional Benefits: Breaks down fish waste • Reduces algae growth • Filters suspended debris • Supports beneficial bacteria • Prevents harmful turnover events • Creates a thriving, balanced ecosystem.
In water deeper than 6–7 feet, a thermocline forms—oxygen-rich water on top, oxygen-poor on the bottom. Bottom aeration breaks this layer, adds oxygen at all depths, and releases harmful gases like methane and hydrogen sulfide.
Critical for Pond Health: Without aeration, natural turnover can cause sudden fish loss. Start slowly, increasing run time daily to avoid shocking the system. A clean, chemical-free way to support a balanced, healthy pond season after season.
OX-Gen Series Diaphragm Aeration Pumps (1.23–5.3 CFM)
