I wouldn't get concerned with runoff at this point. And the pH "I think" is important for every watering, but I don't think one watering with un-pH'd water would hurt much unless your pH is at a crazy number?
They look great. Much happier in their new home.
One technique is to lift pot so you know what it feels like when fully watered so when it's light you know when to water. You can really feel the difference. I usually let mine sit an extra day just to be sure she's dry.
Also water around the edge of the pot so the roots grow outward to find the water.
Don't expect too much to happen above ground when the roots reestablish themselves.
What sort of compost did you use?