drop in an airstone. surprisingly enough, the only luck I have had over wintering
water plants is when the water was aerated. Ingrid

GrannyGrump wrote:


It is not whether the water will change going over the waterfall, but the
action of the type of bacteria, and the waste products produced. Aerobic
digestion does not produce hydrogen sulfide or methane which smell bad and
are toxic to the fish.

So how would a 4 or 5 foot deep veggie filter be created to not have
this happen?



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