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Ph - not following. AN has PH Perfect and the few times I've measured it has been just that - 5.9-6.3, or perfect. Ppm - not following. I add 4ml/l of Grow-Micro-Bloom and 2ml/l of B-52 into the reservoir. Again, the few times I've measured I've had a net EC of 1.4-1.5.

I mean, the only variables as far as I can tell are vitamin B deficiency and poor water quality.

Alright. I have a standard 3*3 tent and a Wilma 4 XL (the one with 18l pots) with pebbles. Right now I use a 600w HPS CoolTube (previously a 400w open). My exhaust would be a small CanFan, but nevertheless I can't feel any significant difference in heat. During flowering, I change the water and...

My yield has been consistent at 0.17-0.18 g/w at 56 days of flowering as the seed bank recommends. It should be obvious that I need to start using more then AN grow-micro-bloom. In all likelyhood I've mastered this thing by now. But which one do you think would help the most, BigBud, Overdrive...

I'm talking about temperatures of about 0 F, not the refrigerator sort.

I'm ordering my seeds by mail. Thought if the cold weather can damage them. Right now, after a week of germinating, I have a sprout rate of 3/8 with a fourth seed slowly growing out of the rockwool. Could it be they have been too frozen in the mail?

Grow room: 3*3*6 tent, and four plants total would make one plant per 2.25 square foot. Lighting previously non-branded 400W HPS, now 600W CoolTube. I keep the light as close to the roof as I can since it's connected to the exhaust fan. Shouldn't matter too much. Normally I veg the plants to...

I've had major yield issues. Not once have I exceeded 0.3g/w. I'd like to know what I'm doing wrong. -My grow system is a Wilma 4 XL. I change the water once a week, and I also flush the tank to get rid of as much of the old water as I can. -Temp shouldn't be an issue during the cold months...

Dearly noted. I'll go full-term after all. Sorry but for privacy reasons I no longer upload pictures of my plants. How about having a net in the tent? Some grow shops actually sell nets like that specifically for indoor growing. They are intended for green screens, but do they work supporting...

Normally I go like 8-10 weeks, but this time I suspect I can harvest as early as 6 weeks. I just upgraded from 400W to 600W HPS and the plants are about to collapse under their own weight. What could be the harm in an early harvest like this?

Does anyone have any info on which DR growtents have ports specifically for CoolTube lights? Sorry but many grow shops and websites are a bit scetchy on this subject and I want a tent that has can easily handle CoolTubes.

I adjusted the timer to my feed pumps to pump less and more seldom. Now they are on like 30 minutes every 6 hours. And the foul smell is gone! Turned out I overwatered after all!

Right now I have two 3*3-feet tents with Wilma 4's inside. What I intend to do is to upgrade to a single 5*5-feet tent and have a Wilma 20 inside that. This means that the area for each plant will be roughly halved. What does this mean in practice? Can I, for example, still use the lower buds?

But seriously... root rot with Wilma, and I'm still using a timer to control watering. Anyone else had this problem?

Also, I got a dehumidifier here for 650$. Just a thing... dries 8 gallons every day but holds only 2 gallons of water. Does it mean I'd have to empty it four times every day? And yes, I don't overwater my plants anymore so the problem shouldn't be root rot.

You mean the bad smell actually can be because of too high humidity?

My grow is producing far too much moist air for my apartment, especially since I upgraded to 600W HPS. Obviously I cannot vent outside since the replacement air would be too cold. The moist will damage by apartment, and also produce a horrible smell. What could help with this? Larger fans maybe?

That's exactly what I do, but they can still easily hear the fan noise from outside. Something I should be worried about?

Obviously that works of you have a house. But I live in a smallish apartment. Before the winter comes and it starts to get seriously cold, the apartment would get unacceptably warm from the HPS lights.

You wouldn't want to have anything else then a very modest grow operation without ventilating your apartment. If you don't ventilate, the same air would simply circulate, get moist and produce mold. Not good. You need to dump the exhaust air from your grow tent out.