Build a fish farming cage system , you only  need those material as below

1. pontoon cubes  as the main buoyancy productions , you could build different size  fish farming cage with it 

2. fish nets

those product don't pollute  environment like other  Foam products  , and the lifespan is 15years

 pontoon cubes for fish farming cage  (size :1000x500x400mm)

Effect drawing of fish farming cage , we could design it according your need .

fishing pontoon cubes Specifications:                         
Dimension: 500mm×500mm×400mm(L*W*H)  & 1000*500*400MM (L*W*H)
Weight: 7.0Kgs/ pc ± 0.3Kgs/ pc
Floating Capacity: 350Kgs/ M2
Raw Material: HDPE
Preference Temperature: -60°C/+80°C Color available: orange, blue, gray, black

Load Capacity:

each one square meter is made up of four pontoons, top load is 325kgs.
Draft without load: 2.5-3cm;
Draft with load of 150kgs: 15-20cm(safe);
Draft with load of 300kgs:35-40cm(load limit)

Anti Wind Wave:

1.The wave on water surface between 2-class and 3-class belongs to safe applicable range.
2.The wave on water surface between 3-class and 6-class can be applicable; however,the safety protection must be reinforced.
3.The wave on water surface between 6-class and 9-class is the restricted applicable range (it is suggested that the shipping shall not be parked and the visitors shall not be in or out).