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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...

Thanks, that was very informative.

Really appreciate that. Haven't added nutrients yet as the plants are just on their first set of leaves. So on the feeding schedule I got from BioBizz, when it says 4ml, that means 4ml of nutrient to each litre of water? And then water as necessary?

Thanks. How do you judge how much nutes to put in the 5 litre container?

anyone? It might be a stupid question but it's better than making a stupid mistake.

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...

Thanks again

Would a desk fan mid way up the tent achieve the same goal? When you say you would keep the outside fan off, do you mean the exhaust fan or just the intake? Thanks for the advice.

Excellent post, thank you!

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...