The 0523 is a real workhorse; just keep it dry and well ventilated and it will work well at 16ft-17ft. I have them in pond applications at 15ft-17ft deep and running for over 20yrs. If you have a deep water concern, for deeper applications put the diffusers on a stand (up 16"-26") instead of directly on the bottom. One option is mount them on top of 2 staked car tires which serve as added height, a weighted base, and a sled to pull them from shore into the pond with a rope. See your PM for more diffuser mounting ideas.
Last edited by Bill Cody; 07/25/16 12:47 PM.