A not so very happy Earth Day for the Cornell Woods Pond

This morning on a walk I noticed that the pond had a thick foam/scum on the northern side. I took a few photos and then didn't think too much about it until I saw a post on the Cornell Woods FB group.



I learned with Sarah Allen, president of the Cornell Woods Homeowner's Association that the chemicals Clipper, Tribune, and SeClear were added this morning. My mom said then she
puts in too much algaecide, SeClear in the pool it foams like this. 

The Safety Data sheets for the three chemicals are:

Tribune: https://www.cdms.net/ldat/mp9UM003.pdf

Clipper: https://www.washtenaw.org/DocumentCenter/View/17166/Clipper-SDS

SeClear: https://www.sepro.com/Documents/SeClear_SDS.pdf

I went back this evening to check on the pond and to take several samples as I still have test kits at home from teaching a remote lab in the Fall. 

The pH was 7.6, phosphate level was about 0.25-0.5 mg/L, and the nitrate level was below detection limits. 

I also took a few more photos. The foam looks almost strand-like. Thankfully, the geese were quite cooperative and allowed me to sample, although one was quite curious and tried to investigate.

 









April 28, 2021 8:05 am

I have since learned that the chemicals were added on Friday, April 23, 2021

I went out and took samples of the pond scum/foam and a few more photos, this time with the SLR camera.  












 

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