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Hello! My name is Matt Johnson (@mattwithhanna on Instagram). I've been working for Hanna Instruments for 3 years and consult with growers every day. I'm here to learn and to answer any questions growers have about pH/EC testing/monitoring as well as fertigation and automated irrigation. Ask me anything!

27 February Update: One month since Germination Temp: 75.4F RH: 55% PH: 6.17 PPM: 509 Lamp: 1000w IPower digital at 75% power and HPS lamp. Medium: Coco/Perlite Gave them all their GH Flora Series feeding today at 1 month since they popped. All systems go. I noticed that some of the lower foliage wasn't getting enough light, so I did the only things I could think to do: Turned up the power to 75% and ditched the tray I had them in so I could give them more space to breath and grow. I have been rotating them around and turning them periodically, so I'll keep doing that too. I continue to look for them to show sex and may have bogey dope on some bandits in the midst, but will give them some time to know for sure. I am anxious to get some ladies into Autopots so I can start cloning soon!. I resolved my low-RH problem by running two room humidifier's non-stop and actually saw 55% today! It's been around 30-35%, so I'm happy with that and think it has something to do with changing the upstairs thermostat and a rise in outside temperature cause it really shot up. I had been measuring PH and PPM in my bucket after mixing in the nutes. This time I read the runoff from one of them to get a PH of 6.17 and PPM of 509- which is a bit low according to the schedule GH put's out, but I am creating a custom schedule so I could probably give it a boost of something next feed?