Just to add to this interesting topic, we make a unique aeration tubing that is used for shallow application, it is called Bubble Tubing.
Imagine a soft keeled kink free PVC tubing (ballast)fused to another soft PVC tubing with fine holes on both sides. The size of bubbles is similar to the Vertex disc. Every twenty feet section is worth about one disc with 1000 holes. We designed and developed this product to create aeration (which is more like circulation and turn-over)for shallow application where regular methods are not optimal.
Where creative layout and good design is used, it does create movement of water in dead zones. Works with low pressure pumps like linear for small ponds, but is designed to work up to 50 psi for deeper application. We found that aeration works best when each individual lenghts are not exceeding 200'.
Another comment about Dave, I have yet to observe that this method or the Vertex CoActive airbases cycle sediments. In fact, sediment disturbances are observed during installation sometimes for up to 20 minutes. The term "destroys" thermocline is a bit negative, because in many cases, the thermocline is the reason anoxic condition appears in near bottom. Destratification, when used appropriatly is an excellent, inexpensive method of preventing phosphorous to be released from sediments... huge topic! Keep it up, I love it!
