RQS Royal Jack Automatic first grow

Day 8 (14/03/2024): Plant are growing new leaves very fast and look like they will be shifting into vegetation stage soon. Given each plant 400 ml of tap water (after letting it stand in an open container for 48 hours to evaporate chlorine) pH'd down to 6.5. Was watering in a circle around 4-5 cm from stem using syringe. Light power increased to 65%. I guess now it is time to start gradually dropping humidity 1-2% RH a day to reach around 50% RH in a week or so since the plants are expected to be entering vegetative stage in this timeframe. I have removed a water filled pan and set the exhaust fan to activate on 69% RH. Day 9 (15/03/2024): After the light power increase, the temperature raised to 24°C. This means that the humidity now has to be increased as well in order to match VPD. Therefore, I had to bring back the water filled pan and set the exhaust fan to activate on 80% RH. Currently, the humidity is at the level of around 75% RH. I have also tried to point the oscillating fan at the light and to constantly run the exhaust fan in order to lower temperature, but neither worked. That means, I will likely have to to keep humidity very high until much later in veg stage (supposedly around two weeks from now), gradually decreasing it after that, Day 10 (16/03/2024): I have noticed that the night temperature is 22°C when the light are off. According to VPD chart, n these conditions the humidity over 75% RH would be a little too much, so I decided to set the exhaust fan to activate on 76% RH to keep constant RH on 75%, which would be a great balance of VPD between day and night temperatures. Day 11 (17/03/2024): The left plant's soil had a little bit of fluffy grey mold on the two spots on the surface. I have carefully removed it. This might be a consequence of high relative humidity in the growing tent. Watered the plants. For this purpose I have added 1 ml of Silica to 1 L of unfiltered tap water. Silica acted as pH lowerer, so the final pH of the solution was 6.5 pH (I have tried using filtered water first, but the pH turned out to be too low after adding Silica). The left plant was given 400 ml of the solution, while the right plant was given 500 ml in a circle using syringe. This difference of the water amount came from the fact that when I tried sticking my finger in soil, the soil of the right plant's soil seemed significantly drier. This is quite logical, since the left plant grows in a smaller pot. The light power was increased to 70%, since the plants are actively growing a lot of new leaves. I have also slightly raised the power of the oscillating fan to make the canopies of the plants move on the air a little. Also, the exhaust fan was set to turn on on 75% RH to keep the RH around 74%. I will try to start lowering the tent's air humidity for 1% every three days or so, to gradually lower it down a little bit to avoid issues such as soil mold. Day 12 (18/03/2024): Plants seem happy, growing fast. The right plant started stretching a little (the left one did not), so the light power was increased further to 75% to combat excessive vertical growth. Day 13 (19/03/2024): Plants are growing very fast, started growing additional sets of leaves at the base of each node. They are definitely in the vegetative stage now. The left plant grows shorter, but with much bigger leaves compared to the right one. The light power was increased to 80%. A little bit of more whitish-greyish mold patches appeared on the soil around the left plant, which I have carefully removed. However, later in a day I did a little research, and it seems that a little bit of mold on the top of the organic soil is fine and is not actually damaging the plant. People on the internet are suggesting to sprinkle the top layer of the soil lightly with powdered cinnamon if I get annoyed by it, which I might do in the future. After that, when I have noticed a tiny amount of mold on the right plant's soil later, I have ignored it. Day 14 (20/03/2024): The exhaust fan was set to turn on on 74% RH to keep the RH around 73%. Also, after increasing the light power to 80%, the grow tent temperature started to occasionally reach 25°C, which I would like to try to avoid, so the exhaust fan was set to also activate when the temperature reaches 25°C. Apart from that, it was noted that the leaves of the left plant became somewhat a little droopy, particularly around the edges. I guess, in my case this might be a sign of overwatering, since the last time this plant was given a full dose of water when the soil was still not completely dry.