I had little fun tonight targeting GSH with a fly using my spinning rod and a casting bubble. Not pictured is the 5" RES that I caught and had a SMB inhale next to the dock, I played the SMB for 15 seconds before he spit the RES out. The RES looked shocked when I unhooked and measured him.
I was a little shocked that there is a SMB big enough to eat a 5" RES in the pond.
I'm sure the reduced GSH population is the reason why I have a little bit of FA growing now. In the past I have put a 5 gallon bucket of pond water on the dock and within a few days it starts growing FA in the bucket, I'd toss the FA in pond and the GSH attack it and it's gone in short order. Having a little bit of FA growing will likely help mitigate the strong algea blooms I see in my pond, sechi disk reading usually run 12-16" range in the absence of FA and aquatic vegetation. My water isn't quite so green now.
I looked at one and figured I could build one myself. So, I did 3 of them and followed recommendations on how/where to place them. To the best of my knowledge not one dang bat used them. One was inside an old barn. The others on trees.