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Coco Tree's

moses wellfleet

Well-known member
Moderator
Veteran
I'm a mushroom farmer by trade and I think I can help contribute something useful to "why does vpd work?"

When you're building a mushroom fruiting room, you build it for positive pressure to keep it from sucking in dust and other contaminate particles like mold spores and bacteria. The constant positive pressure means constant fresh air introduction. The primary source of contamination in microbiology is STAGNANT (humid) AIR. That's why some folks are probably having issues, improper air circulation inside their rooms leading to stagnant gasses inside the buds themselves. Every part of the plant needs gas exchange to prevent stagnation. I've seen the same thing in grow rooms on farms I've done consulting for. Those same principles apply to cannabis growing As long as you maintain a constant positive pressure, you can maintain a mushroom fruiting room above 90% humidity with very minimal contamination from mold, mildew, or bacteria.
I have zero mold issues in a high humidity environment with no air exchange whatsoever, completely sealed environment. So I think it does come down to adequate air circulation. Stagnant air is the cause of problems!!
 
I put in a tee in line after the pump with a valve coming off of it and I have it slightly cracked so it allows air into the line when the pump shuts off. This stops the syphon. It is right at the rez so no water is ever lost. You lose a slight bit of pressure this way but nothing bad. Plus this helps to oxygenate as well.

Yup this is exactly what i do. I t my output run 6 inches into an 90 degree that I point back into the tank run another 6 inches and put a valve that I leave cracked
 

the gnome

Active member
Veteran
I have zero mold issues in a high humidity environment with no air exchange whatsoever, completely sealed environment. So I think it does come down to adequate air circulation. Stagnant air is the cause of problems!!

I have a decent mycology background
growing mushrooms requires a very humid environment for the primordia (pre-mushrooms) to get a good pinset(pins=unopened baby mushroom) with lots of numbers
BUT!
lack of air movement fosters an environment that competitor fungi/molds, trichodermia in particular can get a foothold and grow.
you don't need a lot of air movement like cannabis but you get idea.

I'll soon be running hi RH with a proper VPD to take advantage of my using Co2,
i plan on adding a few squirrel cage blowers with hi grade hepa filters mounted on them
to help keep the spore load to a minimum in the room.
 

Twisted pleasur

Active member
Veteran
Do guys have problems with your carbon scrubbers? High humidity is bad clogs them up no?
Mine seem to be less effective. Any thoughts?
 
N

noyd666

if possible put scrubbers in next room , lung room.yes phresh filters good with ozy carbon the best, fuk the rest.mountain air is good.
 
Do guys have problems with your carbon scrubbers? High humidity is bad clogs them up no?
Mine seem to be less effective. Any thoughts?

Check the Phreshfilters from australia
90%+ humidity running with no problem
one winter i have my exhaust pipes half filled with water because of condensation and still no smell at all, filter was at the end of the pipe so humidity inside was like 100%
same one is now 1.5 year old and i still cant smell nothning
in holland everyone used them until they got banned last year because new laws against commercial growers
in places like amsterdam some people blow straight on the street without any problem

another brands like CAN cant compare
on top of that they very lightweight

this can sound like ad but its not
just my personal exp


:tiphat:
 

oti$

Active member
My humidity has been in the high 60's the last few grows and my can filter seems to have petered out a lot faster than they did when I was running @40-50%rh, fwiw...I'll have to try a phresh as I'm due for a new one.
 

SteelCityGreen

New member
I have a Phresh 6" 530cfm, been running over a year and still going strong.

AC broke last summer and humidity hit the roof, still couldn't smell a thing. Quality scrubbers!
 

Miraculous Meds

Well-known member
Any updates :)



Yep, Hes made the US Olympic cannabis Team. He will be on the next months box of Wheaties.


Jk, hes probably retired already, sitting on a beach somewhere, sipping drinks from a glass with a tiny umbrella in it, being served by some hottie in a tiny bikini.


Or he might be growing big donkey dick colas still. idk....


Actually, if hes retiring this thread, like it looks he has, it should probably be locked up, to not keep adding this non sense with no new info from him. Keep it saved in sticky, icmag immortality, or something.
 
I'm rootbounding 5 gallons, going into 15 gallon fabric pots soon but not going to fill them all the way. Read this thread in december/Jan and started vegging. Any questions, comments or advice appreciated. Using Kiss (maxibloom) in coco with calmag and silica. 5.8 ph. 950 ppm. Only wet/dry the whole way through, I haven't multi fed yet. In new england, 24 plant count. Plan to light dep, 1 air exchange per minute, covering at 5:30 pm and open around 9:00 pm. Also going to cover frame ,maybe with a high diffusion plastic. I also want to multi feed with chilled water, to combat the heat, I'm concerned about dialing in irrigation with inconsistent weather. I've got 2 months of rent left and I'm broke.
Again, any input appreciated, I'm a well read newb.
 

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