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Plant info: soilless mix, ph ~ 6.8-7, 36 days into flower. I thing i'm having a Magnesium Problem and i just wanted to double check. I haven't had any problems other than over feeding the plant with nutrients, and have backed off of them for the last 2 weeks. they were doing fine until the...

I've been using a 175w MH and 150HPS, so Im new to higher wattages and heat issues. I just purchased a 400w hps system and wanted to know a few things about temperature. I have taken a few reading with the sensor at the top of the canopy and it is reading at around 90-92. 2-3 inches down it is...

I have a roughly 2x2x6 room with a 4" inline fan (152 CFM, but running at 50-60%) connected to my hood at one end and the other is left open to pull the air out of the grow room. I'm currently using a 400w HPS bulb (ballast is outside of the grow room) and have 2 - 4" ducts for letting air in...

I have 2 plants: 1) i have a plant that is about 25". it's been under 12/12 for a week now. I'm not sure what to think. the first 4 pics are taken from some of the upper nodes of this plant. (images 1-4) 2) as for the last 4 images, this plant is 14" and images are taken from the upper...

I've been working on a soiless grow, and have run into a problem. It is now week 7 day 6 of veg and only 1 of my plants is having an issue. It is the tallest one of the bunch. I am using ProMix + 25% Perlite. i added it since it seems most people are still having issues with over watering with...

I want to assume that Plant # 1 (images 1-3) is a male. is this correct? Plant #2 (images 4-5) doesn't seem to show any sign, is there a reason why or do you see something i don't? They have been under 12/12 for about 20 days, soil grow, 150 HPS.

I veg'd my plants for 6 weeks under 16/8 (MH), and then put them under 12/12 (HPS) for the last 3 weeks. So far it has not shown any sign of sex. I bought the seed from marijuana-seeds.nl. Does this strain require more veg time before putting under 12/12? I wanted to keep them under 2.5 ft...

I bought a 4" Elicent inline-fan + Speedster Fan Control. The motor on its own is silent when plugged in. The only noise is the air being moved. When plugged into the Speedster, the motor hums louder than the air moving through the fan. Has anyone found a solution for controlling the speed of...

I bought a 4" Elicent inline-fan + Speedster Fan Control. The motor on its own is silent when plugged in. The only noise is the air being moved. When plugged into the Speedster, the motor hums louder than the air moving through the fan. Has anyone found a solution for an Elicent Fan? Putting...