Yes I am draining the pond completely and having it redone then filled hopefully in the spring...I thought it might be better to have the aeration in place at that time..the shape of the pond is somewhat oval or like 2 triangles butted together..I would like to raise a fair number of catfish yearly to catch and eat while maintaining a quality bass fishery without too much algae growth and possible fish loss..is there a book on how to manage aeration year round? like a timetable with what to watch for?, when to aereate and when not too? etc...what does a system cost to purchase and what is the estimated monthly cost for elec. to run 24/7? That is for a pond about the size I have..thanks