Contributed by John Tucci, President and Founder of Lake Savers
Two samples were taken on Monday, August 15th. The results indicate that the microsystin levels remain high. As a result, we are continuing to recommend that you stay out of the water. Caution should continue to be exercised.
Arrangements have been made of for sampling again on Monday the 22nd.
Lake Saver Update
This week we treated the lake with 1,250 lbs. of the Nutrizorb Fast Acting product. We developed this product specifically to reduce the Phosphorus that feeds the Blue-Green Algae growth. Our use of this product is based on lab testing, several peer-reviewed papers and field testing on a West Coast lake for Phosphorus and Blue Green Algae reduction. This was our third treatment since the first week of July. The first two treatments were applied at Lake Savers sole cost.
Following the first treatment, the lake clarity improved for 2 – 3 weeks and the microcystis levels reduced. The lake bloomed again, and we applied the second treatment July 28. This time the lake cleared for a shorter period of time of approximately 1 week. We arrived for the third treatment this week on August 15. We changed our treatment strategy from treating the main part of the lake/deep water to focusing the full treatment on the coves and shallow areas where surface mats were appearing. We spread the treatment over two days.
Matt and I toured the lake on the day after the treatments following some overnight rain. Unfortunately, at least at that time, the treatment did not appear to have reduced the mats/surface algae. With Matt’s help, we are monitoring for changes following the treatments.
Impacts on Total Phosphorus and Sediment Phosphorus
We have seen some impacts on Water Column Total Phosphorus with a 19% reduction Year to Date over last year on average and a 15% reduction from June 23 to August 16 this summer. While this is an improvement, it is clearly not enough to shift the lake away from the Blue-Green Algae Blooms.
Sediment Phosphorus, however, has been reduced by 88%!!! This is very good for the long-term health of the lake, but we also want to continue to sample to see if this is a sustainable improvement versus a “one-time” phenomenon.
Percent Organic of the Sediment has seen a SUSTAINED improvement with a total reduction of 66% from 2015.
Recommendations Going Forward
Our Beneficial Bacteria Research and Development Company has reported success on the floating blue-green algae mats with a product called Aqua-Sticker.
This is a bacteria and enzyme formulation that has shown good success at breaking up the mats when mixed with water and sprayed directly on the mats. We expect to be here next Wednesday and Thursday to do this treatment, and we will be applying 250 lbs. of product.