nhman,Do you know how much sediment or muck you have (approx) your "silt" load wont change much as Scott states as "silt" is usually wind or erosion driven.However even with your pond cleaned out with dozer you will still need an aeration sysytem or the "fill in" process starts all over.You can install structure from shore or here in Ohio we do a lot of it on the ice. Back to your question,I have installed Vertex Air One systems 2000 feet away from pond,supplied 1.5 CFM to 12 feet of water and had over 1CFM at the diffuser (Coactive Airstation) and turned over 2700 gallon of water per minute (thats a lot of water)The hose size was 1/2 inch ID on shore and .55 ID (Bottomline weighted tubing) in the water.For more information on Vertex visit their web page at vertexwaterfeatures.com as with the specifics of your pond you can obtain the exact specs for your pond. This is where diffuser selection becomes very important as most require more CFM to turnover lots less gallons.Ted