the water bouncing over yes and that is fine for water moving over rocks. I guess I
dont think it needs to be any deeper. and my waterfall doesnt go over rocks. Ingrid

GrannyGrump wrote:


From Ingrid's post on veggie filters:
"It needs to be only 8-12" deep so it doesnt go anaerobic."

Won't it go back to aerobic if bouncing over the waterfall rocks?



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