YELLOWING...DRYING UP FAN LEAVES....

Do not use those numbers from the runoff. A good majority of commercial potting mixes are pre-buffered to keep near the 7.0 range. With an aquarium test kit, it's a color coded result, and results are skwewd by the tint of the run-off water. 7.3 tapwater should be fine after adding yuor additives and nutes. A few drops of vinegar or lemon juice on non-fertilizing days to bump the tapwater ph lower should help.

I'm not impressed with the Cha-Ching, but if you're careful it does no damage.
Have not really seen where it does any better than molasses, actually. I use 1 tsp unsulphered molasses:gallon of water, virtually every watering. (but none on feeding day)

i prefer beasties bloomz over cha ching

but my blackstrap works great