Winter/Spring 2023

3/8: conditions are prime now with addition of CO2 boost. I expect to see some serious growth this week. 3/11: just at 10 days from when I planted the sprouts. Increased the dimmer intensity on the 2000 & 4000 watt lights from 60% to 80% and gave each plant about 1/3 of a gallon of water @ pH 6.5. 3/12: with dimmer increased to 80% the temps started creeping up to 77F, which is about the limit of where I like to go. That also means temperature will be a parameter I need to control for, but it is every cycle. So, I added a second humidifier and an oscillating fan to the intake. Then, I took some time to dial in the speeds of the exhaust and intake fans. My tent has one 6” AC infinity Cloudline S6 exhaust (490CFM) with a speed controller and no carbon filter (for right now); one 4” vivosun fan (190CFM) with a speed controller and carbon filter as an active intake; and one passive intake with just a carbon filter and no fan. Dialing in the fan speed ratio will ensure that there is a good transfer of air in and out of the tent- not too much negative pressure and not too much positive pressure. Learned this last cycle when I upgraded my setup and wrongly assume “more power” for everything is best- which isn’t the case. I do this by trial and error- set temp and humidity controllers to desired setting (75F and 70% RH); plug intake and exhaust fans into cooling plug of temp controller; set fan speeds; seal up tent; watch a few exhaust cycles and time how fast the measured temperature decreases when the exhaust cycle kicks on using a stopwatch on my phone or a data logger; adjust fan speeds and repeat until I find the combination that has the fastest temperature decrease. Once I have the fan settings optimized and I know the frequency needed to maintain the temperature where I want it, I unplug the intake and exhaust fans from the temperature controller and plug them into a short interval timer set slightly faster than what I think I need. For example, I watched a few cycles and the fans were going 4min off 7min off to keep the temp at 75F and humidity at 70%. So, I set short interval timer to 4min30s on and 6min30s off. 3/13: first feeding at about half dose of what is recommended by Advanced nutrients.