OUCH!
FLUSH TOILETS NOT SOIL! You did not have a pH problem!!!!!! It was heat stress....and not bad. Just like Bugeye said!
Fresh milk is not suggested! (your trying to add Ca aren't you) Use a milk powder for that and don't boil the eggshells. Simply crush and soak for a cpl of days.....Grind the eggshells down into a fine powder with a coffee grinder and sprinkle on the soil a cpl of tsp of it for longer term Ca and pH management.
Now then,,,,Soil self pH's!!! Metering the run off only gives you the pH of the run off! When you water. The pH will rise and as the soil dries out it will fall back. This IS natural! Use a "Zyme" or "Myco" to keep the living things in the soil doing their job (part of it is controlling the pH).
Would be nice to have transplanted it to a bigger pot....it's getting root bound (slow growth)....still have time if you hurry and put her to veg times for a week or so......don't have to re time it. But would allow for a bit of root spreading.
I don't care at all for CFL's, to weak and by the time you have enough to make up for that,,,you might as well of bought the HPS you thought about buying but was afraid of the electric costs,,my opinion.
DAMN nice looking plant!