OK I did a little work on the procupine structures today. Thinking about using 2 different pipe lenghts. 30" and 48" with the 48" being placed in deeper water. Here is a picture of what they look like.



Bigger picture here http://i290.photobucket.com/albums/ll243/lassig/IMGP1522.jpg

See an issues with doing it this way?

I have 8 5' long 4" PVC already drilled for PVC trees, free to the first taker.