Description
InWater Plastic Frame Diffuser 300mm (12″)
High Efficiency Ceramic Oxygen Diffuser for Aquaculture
The InWater Plastic Frame Diffuser 300mm is a professional-grade ceramic oxygen diffuser engineered for efficient oxygen transfer in aquaculture and water treatment systems. Designed to create ultra-fine micro bubbles, this diffuser helps maximize dissolved oxygen absorption while minimizing oxygen consumption and operating costs.
Unlike traditional coarse bubble aeration systems, the InWater diffuser produces millions of fine bubbles that remain suspended in the water column longer, increasing oxygen contact time and improving transfer efficiency.
The durable plastic frame construction makes this model ideal for saltwater and corrosive environments where long-term reliability is essential. Its compact 300mm design is well suited for hatcheries, transport systems, smaller tanks, and intensive aquaculture applications requiring efficient oxygenation.
Common applications include:
- Marine aquaculture systems
- Saltwater hatcheries
- Recirculating Aquaculture Systems (RAS)
- Aquaponics systems
- Live seafood holding tanks
- Fish transport systems
- Fingerling production tanks
- Oxygenation systems
- Research facilities
- Water treatment applications
The ceramic diffuser surface is resistant to chipping and peeling and is designed for long-term, reliable oxygen diffusion performance.
Key Features
High Efficiency Micro Bubble Technology
Produces ultra-fine oxygen bubbles for improved dissolved oxygen transfer and reduced oxygen waste.
Corrosion Resistant Plastic Frame
Durable plastic frame construction ideal for saltwater, marine, and corrosive aquaculture environments.
Compact 300mm Design
Perfect for hatcheries, smaller tanks, fish transport systems, and oxygenation applications where space is limited.
Integrated Check Valve
Built-in check valve helps prevent water backflow into the oxygen supply line. Valve opens automatically at operating pressures above 8 psi.
Durable Ceramic Diffuser Surface
High-quality ceramic material designed for consistent bubble patterns and long service life.
Easy Maintenance
Simple cleaning procedures help maintain efficient oxygen transfer and diffuser performance.
Technical Specifications
| Specification | Details |
| Product Code | 10788 |
| Product Name | InWater Plastic Frame Diffuser |
| Diffuser Length | 300mm (12″) |
| Case Size | 376 x 85 mm |
| Stone Size | 297 x 60 mm |
| Weight | 1 kg |
| Material | Plastic Frame |
| Diffuser Type | Ceramic Oxygen Diffuser |
| Application | Saltwater & Freshwater |
| Flow Rate | 1 – 3 LPM |
| Recommended Operating Pressure | 20 – 30 PSI |
| Maximum Pressure | 50 PSI |
| Connection Size | 1/4″ Barb |
| Bubble Type | Micro Bubble |
Oxygen Transfer Performance
The InWater 300mm plastic frame diffuser is designed to provide efficient oxygen transfer across a wide range of aquaculture applications.
| Operating Pressure | Recommended Flow Range |
| 21–35 PSI | 1–3 LPM |
| 28–42 PSI | Optimized Oxygen Transfer |
Benefits of Micro Bubble Oxygen Diffusion
| Benefit | Result |
| Fine micro bubbles | Improved oxygen dissolution |
| Longer suspension time | Higher oxygen transfer efficiency |
| Reduced gas wastage | Lower operating costs |
| Stable dissolved oxygen levels | Improved aquatic health |
| Uniform oxygen distribution | Better system performance |
Saltwater & Marine Applications
The plastic frame design is ideal for marine and saltwater environments where corrosion resistance is essential.
Suitable applications include:
- Marine fish hatcheries
- Barramundi systems
- Prawn and shrimp farming
- Live seafood holding tanks
- Saltwater aquaponics
- Ornamental marine systems
- Marine research facilities
- Recirculating aquaculture systems
The corrosion-resistant plastic frame provides long-term durability in demanding saltwater conditions.
Installation Guidelines
For optimal performance:
- Install the diffuser horizontally.
- Ensure the diffuser is fully submerged before pressurizing.
- Install deeper in the water column for improved oxygen transfer efficiency.
- Avoid blocking the diffuser surface.
- Use compatible oxygen regulators and flowmeters.
- Do not exceed 50 PSI operating pressure.
Multiple diffusers can be connected to a common oxygen supply line if required.
Maintenance
Routine cleaning helps maintain consistent bubble distribution and efficient oxygen transfer.
General Cleaning
- Rinse with clean water
- Scrub with a hard bristle brush
- Remove slime and loose deposits
Cleaning Plugged Diffusers
If fouling reduces performance:
- Dry the diffuser completely
- Sand the ceramic surface lightly using coarse grit sandpaper (#40–#60)
- Remove the fouled outer layer
Important Notes
- Avoid contamination with oils
- Prevent physical shock
- Store dry when not in use
Advantages Over Standard Air Stones
| Standard Air Stones | InWater Ceramic Diffuser |
| Larger coarse bubbles | Ultra-fine micro bubbles |
| Lower oxygen efficiency | High oxygen transfer efficiency |
| Short lifespan | Durable ceramic construction |
| Uneven airflow | Uniform bubble distribution |
| Basic aeration only | Commercial aquaculture performance |
Ideal For
- Marine aquaculture
- Saltwater hatcheries
- Fish transport systems
- RAS systems
- Aquaponics
- Live seafood holding tanks
- Fingerling production
- Oxygenation systems
- Research facilities
- Water treatment systems
Product Includes
- 1 x InWater Plastic Frame Diffuser 300mm
- Integrated check valve
- Straight nipple connector fitting
