April 24 significant rain raised the tank 4-5ft and lightly overflowed the spillway. The water flowing from the wetland into the tank smelled like a bait shop! Several days later and another 2" of rain - water went over the emergency spillway for the first time. The wetland and tank have been overflowing non-stop now for a month. Once the water receded some I observed some BG swimming from the main tank upstream to the wetland. Since then I have not observed any BG in the wetland. There are thousands of FHM though!
The mosquito population exploded in late April. Since then the dragonflies and everything else has significantly reduced the numbers and no larvae have been seen in the wetland!
The water results came in. As expected it is pretty salty. Our watershed includes an old salt lake and our tank site was also likely a salt lake in the 50s. The wetland is significantly more saline than the wetland. I am posting the full water results on a separate post for review.

Last edited by ShortCut; 05/29/19 11:30 PM. Reason: Flying vampire update