Just curious, why are you filtering the intake air?
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I filter my intake to prevent mold, fungus, and insects from getting in my rooms easily. 
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Are you using a HEPA filter?
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I am using a hepa filter on one room pulling from an inside room and a charcoal filter on one pulling from outside.
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Just Like ryasco Said 
no dust insect or mold. Or less chance to get one od them
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Hello guys 
week update
Day 23 in flower.
Day temperature 25 - 28c 77 - 82f
Night temperature 20C 68f
Day humidity 37 - 55%
Night humidity around 67 at max
Root temperature 18-20c, 65-68f
They streched has stopped.
Nutrients: Advanced nutrients: base A+B, Big bud, bud candy and B-52
Water pH 5.8 Ec 1800 700ppm
Runoff water today pH 6.0 - 6.1 Ec 2600 ppm 1300
They drink 1,5L each every two days.
I flushed them with clean RO water pH 5.9 on day 16 flower, beacouse my nutrient runoff was 3200. The RO runoff was Ec 1800 700ppm pH 6.1
They are still healthy af and no leafes are turning yellow. They Have really big pistils and lot of them which I am happy about And the pH is also great
I also upgraded my watering system and added three more needles to each pot so the watering is more even. Works great!
Some pictures from 17.12.2017 19:00pm
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Hi! I just found some of my old photos when I was growing outdoor that I wanted to show you
This is one very beautifull pheno with incredible pink-purple pistils I grew sometimes on 2014. I think that its Serious6 from serious seeds Look at her! The colour dissapeared when I cut her down and dried. but beautifull look when she was blooming
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thank you for sharing. how was the smoke? it looks like long thin sativa leaves
I dont remember very much 
I know that it was strong citrus smell and was very yellow colour after some curing but dont know the taste…
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Hi guys. Just need a little help
Right now I water my plants with 15 litres of water (5 galons) every two days. Everytime I fill up my 1,5 litre bottle with solution and water one plant per bottle as quick as I can The water runs throug the coco and I can hear the oxygen sizl on top of the medium 
I have always 30% runoff this method (my pots are 1 galon) then I measure my pH and Ec. I can clearly see my salt build up I always water with Ec 1800 - 1900 pH 5.9. And my salts go like this: 2200 - 2330 - 2500 - 2600 and 3150 two days ago. But my pH goes like this: 6,1 - 6,1 - 6,0 - 5,8 and 5,7 last time.
So…I have a question Do you think I should flush? I am in 5th week flowering. Last time I flushed was exactly 2 weeks ago when my Ec was 3200 and it went to 2000 beacause of the flush Please help The plants are looking absolutly beatiful and super healthy and no there is no sign of overfeeding what so ever. But I am a bit worried about he high Ec. What do you think?
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the plants don’t sit in the runoff until it evaporates do they?
No the runoff water flushes down to the reservoar and There is hydroton on the bottom of the pots…
Hi guys new update
Day 33 in flower.
Day temperature 25 - 28c - 77 - 82f
Night temperature 20C 68f
Day humidity 37 - 50%
Night humidity around 70 at max
Root temperature 18-20c, 65-68f
Nutrients: Advanced nutrients: base (1/2A)+B, Big bud, bud candy and B-52 + 13 grams Calcium (they showed small Orange spots on some leaves. Since I started to give them only half of the A nutrients where is Calcium its not surprising they showed some deficit. But they are really dark Green so I didnt want to add more N. I decided to give them only Calcium from GHS.
Water pH 5.9 Ec 1800 - 2000 - 700ppm
Runoff water today pH 5.7 Ec 2700 ppm 1300
They drink 1,5L each every two days.
I flushed them with clean RO water pH 6.0 on day 30 of flower, because my nutrient runoff was 3300. The RO runoff was Ec 2000 800ppm pH 5.9
They are still healthy af and no leafes are turning yellow. They Have really big pistils and lot of them which I am happy about And the pH is also great
They should be ready on day 60 acording to dinafem seeds and they are already huge
Some photos from today day 33.
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Hi guys Some of my leaves Have these spots. It might be more visible if you zoom in the picture I think its Just Light Calcium deficiency. What do you think? Thanks!
This is bottom leave
These are top leaves
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Looks like cal-mag.
The bottom leaves will start to be consumed naturally, I wouldn’t worry so much about the bottom leaves, I’d be paying attention to the top “new growth”
Bump up your calcium and Mag supplement and monitor it close. Remember, Calcium is an immobile nutrient so your damage won’t “repair” itself, but it won’t get any worse.
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I see the burns on the ridges of the leaves, they start at the tip and move down the perimeter of the leaf. It suggest nutrient burn from high EC levels, I would back that EC down a bit by flushing like you did before. Just my 2 cents.
Otherwise your plants look great and buds are looking fat 
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I know nothing about Hydro, but the burnt leaf tips are usually a sign of over feeding in the organic soil world.
99%
I added more cal mag in Last two waterings and I will watch if it gets worse or stops But I think that its deficiency because that would make sense. In Last two weeks I fed them with only 1/2 of my A bottle nutrients which contains most of the calmag and the spots started to apear…
Will see thanks for advice!
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When in doubt, check your runoff ppm and ph, if it’s within acceptable levels then you have a deficiency, if it’s high then you have a surplus lol. They are looking good and looks like you only have about 3-4 weeks to go anyways, the plants gonna start eating itself anyways.
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