Like you said the plants are looking good!! If my plants are dark green, leaves at a 30-45 degree angle towards the light, and no falling leaves the off the bottom, she's got just the right balance in the soil, with a ph of 6.2-7.0
Now to the contrary, if you raised the ph to around 7.0 and then you water with 8.5 water every single watering for the next few weeks.....it will push the ph up, cause lock-out and micro nute deff. all over the place.... Dont think it wont!!! The flowers really suffer if they do not have the exact amount of every single macro and micro nute's in a perfect balance.
If your only growing a couple plants.... you dont really have to keep an eye on it, but when it starts causing a yellow leaf here, iron deff. on that one, phosphorus deff. over there, you will be kicking yourself in the ass because the only 2 plants you have, are messed up and now they are going to suffer when it comes to flowering.
Its actually easy as hell, take's only like 2 minutes to adjust your water ph. The most important thing I have learned in 18+ years is, ph is one of the most important factors of a good harvest. As soon as gets out of the 6.2-7.0 range you will have sad plants.
Grow in a pine grove with lime....lol haha see what you get.
good luck op, what your doing is working, Dont change a whole lot until you start having issues, then find a solution to fix the problem. Its easier to prevent ph problems than fix them for sure!!