The guest speaker was Jeff Randall of Agro Shield Blue/Green Tech, which is part of Agricultural Crop Company. After an inquiry about “Blue/Green” in the title of his company (as this is not currently applicable to our lake), he explained that treatment of blue/green algae is not the only thing his company does. Their algae reduction product is similar to our copper sulfate which is encapsulated in paraffin. Theirs is a two-year old product that encapsulates the copper sulfate in a food grade lipid. Their product floats for 24-48 hours before settling on the lake bottom. This product works on chlorophyll based algae. His company looks for chlorophyll A and the percent of dissolved oxygen. They are also working on a hydrogen peroxide based product. They do not apply the product but work through any state-licensed applicator. He showed photos of before/after treatment of a lake in Florida.

He also talked about reducing phosphate in the lake with the use of biochar in a filtration sock to filter phosphate from the water. This would be placed at inflow areas. They would work with our lake management company. This is a proactive approach, whereas using copper sulfate is a curative action.


Compared to last year’s year-to-date donations, we are about $400 ahead. But, there are too many factors in play to think that we are truly ahead.

Unfortunately, MLIF did not receive any money from the Richardson Fund this year, and we have been unable to obtain feedback from the granting agency to understand why our application was not funded.

Lake Management
We have had eight algae lake treatments this year, seven that we paid for, plus one extra. The last treatment is scheduled for September 23. It was noted that the August 20 treatment included an herbicide for the invasive aquatic weed Coontail. It was suggested that if we have a similar amount of Coontail next year, that the lake be treated earlier in order to reduce the resulting biomass on the lake bottom. It is likely that we will have significant Coontail next year as it spreads by fragmentation.

The estimate for use of Phoslock (see 6/6/19 Board Meeting Highlights) throughout the lake is between $40,000 and $100,000. Pond & Lake Connection (PLC) can test for phosphorus at various points around the lake over a period of time in order to gather data to estimate how much Phoslock would be needed to make a significant difference. After much discussion, a motion was passed to use $2,500 from our reserves to fund a study of the phosphorus in our lake. The vote was 9-0-1.

During the above topic, other causes of phosphorus loading were discussed. Question were: Are septic fields by the lake leaching? Does the town test for leaching?

Several working meetings over the years to revise the bylaws have been held. Finally, with the latest attempt, a revision is ready for review and approval. The main changes were noted, and the Board members were requested to review the new bylaws by the next meeting so we can at that time vote to adopt them.


We had at least three full families of geese on the lake this year despite our addling efforts. At one time, over 40 geese were seen. They didn’t have enough to eat while in the lake, so they came out of the lake to eat the grass (and poop) on the Mamanasco side every day. Six nests were found and the eggs addled.

A blow-up floating swan that floats by their dock that seemed to scare the geese off one dock and yard on the lake.


Join Our Mailing List


Be a “Friend of the Lake”:

Donations can be sent to our PO Box

Mamanasco Lake Improvement Fund P.O. Box 246 Ridgefield, CT06877

Amazon Smile

Donate to the lake by buying using Amazon Smile. Its simple when you shop go to
Amazon Smile
and .5% of all your purchases will go to the Lake! its that easy.