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04-06-2009, 03:23 AM #9OPSenior Member
AK-47 in E&F - rockwool/clay medium (First Grow Log)
Musta been the H202 then. After taking a look at a post in a message board catergorizing plant problems, I think what I may be having is heat stress on the seedlings. At least it looks like it from the picture that was posted, and it would make sense. I had 4x T5 HPS at 2 feet from the seedlings so that was probably too close and then tent temperature has been in the 78-82 range during its normal light cycle. Now, after changing the light cycle to night time max temp today was 78 so its alittle better, if not by much. The room temperature has dropped by about 5-6 degrees though so it has made a decent difference. Now, about my water...PPM was like [email protected] when I first filled the resv. Today it was at like [email protected] at 5pm and the PH had dropped from 5.6 to 5.4. I added a bottle of DI water which nocked the PH down to 5.0 and was at [email protected] at 11pm after 2 waterings. I just added three gallons of straight tap water which brought my PH up to 5.6 and my EC to [email protected]. I find this really strange and I'm honestly not sure whats going on. I'm going to check it one more time before I go to bed in an hour or so but the next watering isn't till 3:30am.
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