Your water parameters look great!
I asked Marvin Emmerson, whose family developed the Emmerson strain of trout in Ava, Mo. to look at your pics and give his opinion. IIRC, he said PH was not much of an issue with trout. I also doubt your inflow would change the PH fast enough to cause any stress---Not much different than runoff into a natural stream.
Are you sure? The pond is 100,000 gallons and I run about 64,000 gallons through the pond in 24 hrs. when the well is running. I do know there are trout hatcheries with low PH's that have problems when there is a heavy rain as the rainfall PH is even lower. I've also heard of PH shock with heavy snow melts in watersheds in New England that already have low PH's.
Try your antibiotics. I'd still add some salt--it's cheap and is a stress reducer.
Yeah I'd like to add the salt and hope to. I may do a PP treatment too.
I'm thinking of adding Aquashade like I did last fall. My thoughts are reduced visibility will reduce fighting.
