Coach B..here's some answers.
1. Yes, it will. Most ponds stratify at four to five feet each summer. Releasing water below the thermocline is beneficial.
2. Use a bigger pipe. You probably need 14" or larger.
3. I attach the sleave by drilling holes across the pipe, six inches from the "top" of the sleave, then running a piece of all-thread through the holes, providing a "bar" all the way across it. Then, I drill a second set of holes perpendicular to the first, and run a second piece of all thread, so they look like an 'x'. Secure the all-thread with nuts. Then, gently drop the sleave over your pipe. Works well, and is easy.


Teach a man to grow fish...
He can teach to catch fish...