- Design and materials for cages

March 19, 2008

We want to share ideas and experiences in design and use of cages for fish and shellfish of the sea, especially in tropical conditions (with a lot of joking or "foul") and the lowest possible cost (despite being sacrificed durability).
For now postulate three materials we are using and testing their durability:
PVC-coated pipe gelcoat (which is mostly exposed on the surface) to prevent cracking that produces ultraviolet radiation. PVC can work wonders, but not the best sites for material flows. We will soon prove PVC pipe for irrigation, which is a little more expensive but has been treated against UV radiation. PVC cage needs time to adapt well to flotation, which comes to the screen when it gets wet and it accumulates joke sticks, that's when you must stop putting floating units, we use plastic bottles or pichingas 15 to 20 liters.
Rod-iron construction. The most inexpensive and quite durable. We must treat it well against rust, but it is achieved. The point of using this material is available everywhere, any welder does the job and is very resistant to sites with currents. One advantage of the rod of iron cages that can be used underwater, even in the background. Buoyancy is important for a small cage (say, 2 or 3 meters in diameter if round) deal pichingas about eight of 20 liters, or tied.
-Wood or bamboo. This material has little time but can be used if available, especially bamboo.
WAITING FOR YOUR COMMENTS.