6/9/19 1:00 am Start of day 16
temp 79 rh 72% ec 1.0 ph 5.9
Hey everyone, time for an update. They are really starting to grow, especially the roots. I increased the calmag to 2.5ml/gallon. Phylos emailed me that they received the samples are they are being processed now. I'm hoping to get the results by the 11th but might not be until the 14th. The four chosen for the test are still the strongest, and on top of that, the 2 that I didn't pick have some growth anomalies anyway as you'll see in the pics. I set the humidity to 72%. Sometimes I increase temp to 85f in veg when using co2. Thats the highest I go and when I do that, I use 75-77% humidity to stay in my desired vdp range. Since we are around 78-80f now, Ill stick with 72%. Ill attach the vpd chart I use for reference. I'm sure most of you already know, but if you're not familiar vpd stands for Vapor Pressure Deficit. I can go into detail but it is easily found information, and very important, especially for indoor gardens were we have much better control over the environment. I also hooked up my 2nd timer and connected the 2nd humidity controller to it. This controller is connected to a 6' duct fan on the floor that removes moist air and keeps the lights off rh at 60%. I don't allow lights off rh to exceed 60% at any point in the grow after the first few weeks. Basically once the plant gets some leaf mass and the chance for powdery mildew arises. The timers are synced so they switch at the same time. The other timer controls the light, exhaust fan, 1st humidity controller and co2 controller.Everything else runs 24/7. I have an interval timer that I would normally use on my water pump, But since I am using a chiller, I run my pump 24/7.
I ended up fixing my airlines so that they weren't in the way. I said originally that I was using 6" stones but they are 4". I bought 2 extra but snapped the barbed connection on one and said screw it. So just 3, but I think its more than enough. I've heard varying numbers for air pumps, but I think it depends most on water surface area. You want the entire surface to be constantly agitated. Like anything, up to certain point, more is better. I benefit from the waterfall effect of the chiller return and am pumping 1.25 lpm of air per gallon of water which is about 20 gph per gallon of water, but again that number is not as important as surface agitation. So it really comes down to what type of stones you're using and how you place them.
I also got a close up shot of the bottom draw adapter on the water pump so you could see how it functions.