Core Advantages: As an improved new-type float, PET has a stable molecular structure, with pressure resistance (0.3-0.5MPa water pressure) and anti-aging performance far exceeding other materials. In deep-sea oyster aquaculture, when used with 316 Stainless Steel Oyster Bag Shark Clip to fix HDPE Oyster Grow Bag, it can resist high-wave impact and deep-sea water pressure, preventing mesh bags from being dragged and sunk. Its bright blue and red colors provide a sea surface recognition distance of over 50 meters, making it easy for farmers to quickly locate the floats and reduce the loss risk of HDPE Oyster Mesh Bag and floats. Additionally, PET releases no harmful substances, complying with the EU No. 10/2011 environmental standards for aquaculture, which is suitable for export-oriented businesses. Oysters cultured with PET floats can be directly graded by our Dual-Spec Roller Oyster Grader (SS304 material), achieving a seamless connection of "aquaculture-grading-export".​

Disadvantages: Higher cost than HDPE and EVA. When used in shallow water environments (e.g., freshwater fish ponds) to fix simple fishing nets with PA66 U-Type Thickened Cable Ties (10mm×40cm), its cost-effectiveness is slightly lower than HDPE floats.​

Core Advantages: High toughness and impact resistance. In shallow-sea scallop and clam aquaculture scenarios, they can be bound to small fishing net enclosures with PA66 U-Type Thickened Cable Ties (10mm×40cm), withstanding fishing boat collisions without breaking and preventing shellfish escape due to enclosure displacement. With moderate cost, they are the mainstream choice for shallow water environments (water depth ≤10m), adapting to the initial aquaculture needs of HDPE Oyster Mesh Bags for family farms or small-to-medium cooperatives. When the floats are used with mesh bags, they can reduce the loss of seedlings caused by unstable floats.​

Disadvantages: Insufficient pressure resistance, unable to be used in deep-sea scenarios with water depth exceeding 10m; lower color saturation, resulting in weaker sea surface recognition than PET floats; long-term exposure to strong UV rays causes surface aging and yellowing, with a service life 1-2 years shorter than PET floats, requiring more frequent replacement to ensure stable buoyancy for HDPE Oyster Mesh Bag.​

Core Advantages: The lowest density (0.91-0.93g/cm³) with high initial buoyancy and soft material, suitable for freshwater fish ponds and shrimp ponds with limited budgets. It can be used with simple fishing nets without scratching the net body, reducing equipment loss costs. With lower cost than HDPE floats, it adapts to the short-term aquaculture needs of small-scale farmers (e.g., shrimp seed temporary rearing).​

Disadvantages: Poor anti-aging performance is a fatal flaw. In seawater or strong UV environments, surface cracking and water absorption (leading to weight gain) occur within 3-6 months, resulting in rapid buoyancy decline. It cannot be used in seawater scenarios with 316 Stainless Steel Shark Clips or HDPE Oyster Mesh Bags(prone to mesh bag sinking due to insufficient buoyancy). Weak pressure resistance makes it unable to protect HDPE Oyster Mesh Bags against high waves, only applicable in calm shallow water environments.​

Core Advantages: Extremely low cost, only suitable for temporary emergency scenarios such as short-term fish pond enclosures (e.g., water level marking during temporary water replenishment after heavy rains, or simple enclosure fixing for temporarily isolating sick fish).​

Disadvantages: Poor environmental friendliness, releasing plasticizers (e.g., phthalates) after long-term immersion, which pollutes water and fails to meet aquaculture safety standards. It cannot be used with HDPE Oyster Mesh Bags (prone to oyster pollution). Extremely poor weather resistance and corrosion resistance lead to aging and cracking in seawater within about 1 year. Low buoyancy makes it unable to support the transportation of commercial oyster mesh bags graded by the Oyster Sorting Tumbler. Currently, it is gradually obsolete in the market and not suitable for long-term use with any of our core aquaculture equipment.

 

If your core business focuses on deep-sea aquaculture, export-oriented aquaculture equipment (needing to comply with EU environmental standards) or high-stability marine applications, PET Air Cylinder Oyster Bag Floats (80CM×10CM, blue/red colors) are the best choice. They can form a "float-fixation-aquaculture" set with 316 Stainless Steel Shark Clips, HDPE Oyster Mesh Bags, and PA66 U-Type Thickened Cable Ties, and then be graded by the Dual-Spec Roller Oyster Grader to build a full-process aquaculture solution, providing customers with long-term use value and safety guarantees.