| Akai-San: I used UV a few years ago, but stopped when I realized the water was clear and the UV had been unplugged for a month. I do not have the truly perfect clarity that can be accomplished, but when the pond was shaded by trees it was as clear as any I've seen in the area, excepting one. Now that it is in full sun most of the day, there are bits of algae that slough off the pond walls. These fine filaments cause me to think of the water as less than clear, but non-fanatic visitors think it is clear. I think my relative "success" is due to the carpet of algae on the pond walls and floor inhibiting competitive algae growth in the water column, together with sufficient filtration that ammonia and nitrite are never an issue.
I'm hoping things will stay as good when the new pond gets constructed, because one corner I cut to save money was: no UV. |