:4_13_71: These three things are an must for a healthy, happy pond. Filtration, Circulation, Airation. With out them your pond will turn into a stink hole. The gravel bottom will only compound the problem because you cannot clean the gunk out of it.
calvino said:Also, my friend had a pond with no filtration it basically cleaned it self(Water was clear), but i guess that is rare.
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