Looking for the best aerator for keeping from having muck on the bottom of my pond. I thought from researching the bottom diffusers were the best for this application. Than I go and find a picture(attached) that shows the fountain type with a water smith down tube showing it has better results. I like the fact that on a diffuser i can have the pump up by house and no electric running to pond which would not be the case if i went with the fountain type. Which type do you guys recommend diffuser or fountain? And which brand.