NE pond – still planktonic algae bloom, but less than last time due to treatment and/or weather impacts. We applied bacteria, algaecide to help with the small scum layer in the north corner of the pond.
SE pond (Kay) – duckweed treatment taking effect. Pond was covered some 98% at time of treatment. Obvious damage to duckweed and noted that 75% of pond is covered with duckweed turning whiter in color – good sign. Pond is heading in the right direction.
SW pond – needed more treatment for ring of southern naiad on west and north side of pond. Did a split algae treatment – prepped the algae and then used copper algaecide on top. New mix of algaecides has helped us in problem ponds.
Upper pond – did not treat as wanted more sun and later today we had heavy rain event. Looking to return tomorrow or Friday to follow up on duckweed treatment. Duckweed spread across pond surface and covering 70%. Previous contact herbicide had some effect as white duckweed was noted mixed in with mostly green duckweed. Will return to make decision as to whole pond treatment with 30 day irrigation restriction or continue with contact herbicides.
Lower pond – oxygen levels finally returned so that we could treat. Oxygen levels supported fish to 5 feet of water depth. Sprayed perimeter of pond to start treatment on half of the algae. Duckweed present in large concentrations and this pond would need a whole pond herbicide treatment like the upper pond. Currently focused on algae and reducing the amount. Aquashade seemed to have helped slow/stop algae growth from continuing as we applied 2-3 weeks ago. Water clarity is superb in this pond and we estimate over half of pond supports algae/duckweed production in lake, especially since the perimeter of the pond is heavily eroded shoreline.
Lower pond is an excellent candidate for aeration as well as the NE and SE ponds. Next issue would be to bring power to ponds with aeration needs.
All ponds have seriously eroded shorelines and all of them have a shallow shelf that allows for lots of plant and/or algae growth. These shallow shelf/erosion issues contribute seriously to the pond issues at hand. Will expand on and make recommendations later in the off season as to a more long term approach to all of these ponds.