Blue Cookies First Grow Stealth Box

Things have been good, I noticed the plants were looking a little droopy and the soil of the two plants I did not add Pro-mix to have started showing some sort of green algae or mold. I turned on the carbon filter and it keeps the humidity in the 40-45% range which is drying it out slowly. The temps outside of the grow unit have been pretty low, dropping my average temp inside from 28°C to around 23-25°C, and dipping to 20°C at night. Due to the dampness in the box and the resulting algae/mold formation I have held off on watering for two days from days 19-21. However, on day 20 I discovered some spotting appearing on the lower leaves of my two organic living soil plants, which are my taller more sativa leaning plants of the three. I may have messed up the pH of the living soil, I had some left over coffee dregs in my water can from watering my potato's earlier and it may have caused some problems leading to the spotting. My Pro-mix plant is my shortest one and she's definitely showing wider leaves with more variety of greens and tints of blue. I have been using filtered water that tests chlorine free, but I am led to believe I may have a calcium deficiency. I'll have to name my plants, so far only the shortest has been named. I will follow this post up with a question about the spotting. Thanks for tuning in, one love, positive vibes 💚