Thanks to all for the inputs. I will try incorporation of dunk powder in future pottings, mix up a bit to drench the current plants and continue spritzing soil surfaces and plants with peroxide. The gnats are pretty much gone other than a stray adult or two and I'd like to keep it that way. Speaking of the plants, in 15 days they sure have grown from those little things at the top of this thread! The one on the left is blooming.

They're looking good @GoDawgs. Jochalos is one of my favorite micros to grow.