Round 7. Northern light feminised. 250 watt HOR/VERT. U.S.I.U. automised

[HushemFlupskluk]

Report on positive pressure testing rounds.

Report on positive pressure testing rounds.

Me lad told me he adjusted his extra production capacity with my positive pressure concept to +10%. He said he estimated he had the best result @ + 5% positive pressure. The basis of the positive pressure is normally about 1000 hpa to 1020 (+5%..) here in the Netherlands. I know furter north of my line on the globe the pressure is most likelly a bit lower normally 940 to 1000. Further south to the equator the air pressure rises a bit to higher values say 1020 - 1050. All at sealevel.

I estimate I can guarantee you overgrow on the scale of Pascal --> 1050 - 1100 hPa. Depending on where you are on the globe you need a bit more then 5% positive pressure or less.

Inbetween these values lies the optimal situation for the plants.

He stated that the plant cells are destroyed when the positve pressure is increased to much.

Now he continues this positive pressure sage with increasing the pressure and reducing it back to 1010 hpa in a rithm during VEG period on his clones.

I reported to him the messages I read about reduced air pressure and stimulated plant productivity. Hopefully he picks it up and implements the positive pressure with the reduced pressure in these latest tests.

Thanks for reading! L8er!!

 

[HushemFlupskluk]

Vegtation phase day 15. New 250 w setup

Vegtation phase day 15. New 250 w setup

Ladies are looking good still after 12 hours after the setup switch. In the images from left to right plant 2, 1 and 4

This event caused some trouble in switching the 250w bulbs on. I lost about 45 minutes of daylight of the 20/4 scheme. Strangelly only switching the relays a number of times on and off repaired the malfunction. At first this was pretty exciting. Fortunatelly I had no defects at all and it was all relay related.

Atmosphere 1.
Light 19\5
Powerusage from 24-9 52 kWh
RH 70-75%
Temps 24 - 26 C around the seedlings

Node 4 is showing. Now it is only a few days before I start the positive pressure setup when node 5 is going to show on the plants.

Some close-ups this weekend

 

[HushemFlupskluk]

Vegetation phase. System throttle up to 1+ atmosphere.

Vegetation phase. System throttle up to 1+ atmosphere.

Today earlier then expected node 5 was showing up. All exhausts now are closed to leave a rather small opening of less then 10cm diameter. Tent starts to look pumped.

From sprouting 28-9 until today 15-10 one 105m3 tubefan was used for teh active intake unit. Even the first few days 250w setup was powered by only one 105m3 tubefan. With a constant foggy airflow @ 19 - 20 C this was the perfect airflow for my plants. When the 55w setup was running the tubefan was dimmed to minimal intake speeds.

Now in every stage of the setup with lights on and off I found the aquarium warming the important factor in maintaining a good temperature/humidity/airflow balance.

But now a second 105m3 tubefan is mounted to put positive pressure in there like I did in round Northern light 1 (now NL 3). At night 1 tubefan is turned off to save power. This will leave a slight positive pressure at night.

No pix yet b/c I think the plants need time to integrate into the new setup. Signs of growth are there but they hang a bit. Must be the HPS now shining on them and perhaps I damaged the roots a little bit. Need a few days more to recover probably.

Till then!

 

[HushemFlupskluk]

Vegetation day 21. Full throttle the next 3 weeks.

Vegetation day 21. Full throttle the next 3 weeks.

Yesterday I decided to put full throttle positive pressure in the tent 24/7. It was suggested that pressure diffirences in short periods of time do not stimulate my plants. Since 15-10 I was throttling it only during daylight to save energy, changed my mind to roll back to the situation equal to round NL feminised 1. But now with water warming in the intake unit.

In order to grow huge leafs like did before like in the image.

 

[HushemFlupskluk]

Positive pressure sweet spot.

Positive pressure sweet spot.

Thanks to my buddy doing his research. Making it possible for me to evaluate his experiences and conclusions. He marked a sweet spot in applicating positive pressure in his room. Making it clear that overdoing positive pressure is not the way to do it.

I did my research and found that I really need a barometer to take acurate messurements. Until then I have to do it with graphs from the local weather station as in the image.

You can see the values are rather high in this area. I started off pumping the tent at a tent-out hpa of about 1025. The days after that it dropped down to about 1005 hpa but now it is back up in the 1020>.

I do have a tool for messuring my tent pressure, a small weight on top of the tent. I watch that closelly and the graphs. Trying to learn of what happened during round NL fem. 1.

Round NL fem. 1 started off in positive pressure 10-12-2010. Then in 19-12-2010 I started getting result. Up to 31-12-2010 I had massive growth. Could this be linked to the lower hpa values exactly in that period?

Pix soon enough l8er

 

[HushemFlupskluk]

Vegetation day 24

Vegetation day 24

Atmosphere 1 +
Light 15\9. -0.5 hour light p/d
Powerusage from 24-9 121 kWh
RH 70-75%
Temps 20 - 26 C around the seedlings

Node 7 is showing already.

In 6 days we enter the 12/12 day/night period. Before this moment the lower 4 sets of branches will be cut and the top over node 8

Some overgrow soon

The images show the plants are throttling up, but the nodes are still short. The 4th image shows the passive tent-exhaust connected to the bulb hood. To set the airpressure a 80mm fan is mounted controlled with a dimmer. I found this way the temperatures are under control much better.

Till next update!

 

[HushemFlupskluk]

Thread closed...

Thread closed...

I had to stop this round.

Better next time.

Wish me luck!

 

[Trewarin]

What happened here?
Security?

 

[HushemFlupskluk]

Hey!

That was almost a year ago now. Yeah security. Didn't feel safe anymore to continue because I had a situation going. To bad though the duo bulb setup really was going to change things for me then.

Most important was that I could put on both lights for some hours to illuminate te square better then b4.

Now I'm preparing a new round early october. Diffirent seeds called ASG - Amnesia x Super Silver Haze Feminized Seed. Longer flowering period diffirent plant. In a 1 bulb setup, basically a rollback to the situation during round 5 concerning bulb and plant setup.

L8er!

 

[johnnyrotten]

Well, for the short time you had during this grow you gave a great show! You are so detailed and have everything planned very nicely... Hope to see a new grow from you soon.

 

[HushemFlupskluk]

Well, for the short time you had during this grow you gave a great show! You are so detailed and have everything planned very nicely... Hope to see a new grow from you soon.

Thanks! I did spend alot of time in putting it on ICMAG.COM aswel as I spend alot of time putting it all together. I will be back soon BTW.

 

[catman]

Great thread man.

I started growing in a custom stealth cabinet and being stealth was my priority, odor was my biggest enemy. At the time I believed I wanted to make sure I had negative pressure or else air with odor would leave the cabinet. The most quiet fan and powerful fan I could find had a variable DC motor that was designed to deliver something like 80CFM regardless within in reason of how the intake was restricted. When I would open the doors to the cabinet I could hear my fan slowing down and when I would close the door the motor would speed up again. I decided to add more intakes to reduce the load on the fan (reduce noise) and that worked, but I can now recall and understand how and why my plants didn't like this change. A tensio meter has proven useful below the ground so why wouldn't a similar concept apply to the air above?