Pardon the somewhat of a post topic drift.
That "Gem of a Lake in Southwest Oregon"(Diamond) has been experiencing a cyanobacteria bloom on a year round basis for at least 7 years.
The below cut and paste is part of a 2017 email correspondence I had with Oregon regulatory agencies regarding this...
Oregon......................some time ago I decided that I didn't have the time to fish all the available waters in Oregon. For some reason I seem to have narrowed it down to the same 10 lakes/reservoirs each year.
If you have a Harbor Freight in your vicinity................
https://www.harborfreight.com/head-lamp-magnifier-58788.html?_br_psugg_q=visor
I bought one earlier this year and have used it multiple times.