Ow, I have the same device, that says ph, moisture and luminosity. Do you like it? I realize the proportion between the numbers there and in my luxmeter, and now i understand how moisture works on it, buuuut, pH is trash. Unless you have volcanic soil with pH lower than 6.
As you have this saucer below the plant, you may water from below, and stop watering from above. And for calcium you may use Blackstrap Molasses, it's easy to find and gives a boost in flowering I suggest you reading about it.
Wish you a great grow!!!
Have a Shroom ! !! !!11! 🙌
like 1
