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I'm growing in a tent in an attic that gets very warm in the summer. The fresh air comes from a vent outside, and then there's 9 feet of ducting to the tent. The intake and exhaust fans are both rated 235cfm. Where should I place the intake fan along the 9 feet of ducting to get optimum...

Sweet Deep Grapefruit, under 400w HPS with diy cool tube. Soil Grow. Day 61 of flower. (suggested flowering time 45-50 days). The plants have had some stresses: For weeks 5-7 of flower they were only getting 10 hours light a night. 16 days ago I went away for a week and had a friend look after...

400 watt HPS grow, 12 days into flower. I have four Sweet Deep Grapefruit plants. They've all been topped to produce 4 colas. Now the largest of these plants has two 'celery' stems - they basically look like a thick, green PC ribbon cable. The other two main stems are regular. A little research...

My plants are ten days into flower and starting to stretch. They vegged for over 5 weeks and they seem to be very healthy. My problem is that daylight savings time has just kicked in where I live, and the clocks have gone forward an hour. The daytime period for my plants was starting at 11pm...

Soil grow under 400 watt HPS. 4 Sweet Deep Grapefruit plants, day 32 of veg. I topped them 8 days ago, but incorrectly (above instead of below the third node). This left each plant with 6 new growth sites. They seemed to take to the topping well, and as soon as I thought they were comfortable I...

Soil Grow under 400 HPS. Day 30 since sprout. 24 hour light cycle during veg. The largest of my four plants is looking very depressed. All four were watered yesterday, PH 6.5 water, with Biobizz nutes. We've had an unexpected cold spell, which has lowered the grow room temperature. Usually it's...

I'm doing an attic grow with a 80x80x160 cm tent. I have 4 plants under a 400w HPS. I'm using a 4" fan to exhaust into the surrounding attic. The intake is passive, there's 12 feet between the source of air and the tent, and the ducting has to round a 90 degree turn. Should I add an intake...

Can someone point me in the direction of a good tutorial for preparing my nutrients. I've been searching RIU but can't find what I'm looking for I'm using Biobizz, and want to know: Should I be mixing the nutrients with the water I intend to use for watering, or should the nutrient mix be...

Hi all, I've been reading the forums for a couple of weeks now and have been delighted to find so much information. Thanks! I'm attempting an attic grow, using feminized Sweet Deep Grapefruit seeds from Dinafem. As of today I have five seeds cracked, planted, and under the lights I've...