A fully natural pond will have some algae and muck. Ponds are nutrient collectors and nutrients cause plant growth. The amount of growth is dependent on the amount of fertility present. Lots of dead growth causes the bottom muck.

There are prior posts here about managing a primarily natural, clear water swimming pond. It is very difficult to produce a pristine pond naturally. Mosquito and algae treatments usually involve chemicals. Fish even if they are mosquito fish (Gambusia) or shiners/minnows in the pond will control the mosquitos. Be aware most all algae treatments have copper as the active ingredient. Ideally an older small neglected pond will be best and easier managed if it is drained and the muck-slop removed and the pond is restarted as a new clean basin managed properly with aeration, beneficial plants and minimal black mucky sediments which are hard and very time consuming to overcome.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=388567#Post388567

http://www.houzz.com/ideabooks/25802335?...ontent=gallery0


Last edited by Bill Cody; 05/30/16 09:33 AM.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
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