That looks like a nice planted layout!
One remedy that you might try if you suspect insect pests is to just flood everything so that all of the plants, including the ones on the trellis rafts, are underwater overnight. If you repeat that two or three times over the course of a couple of weeks you can usually kill off problem bugs.
Just keep an eye on that Ruellia plant. Maybe it was just stressed from shipping. Did you add any kind of fertilizer tab to the planter cup? That plant will grow and bloom best with extra root ferts.