How to reduce evaporation??

ufzsolo

New member
Hi y'all!

I have a little issue here I need some help with. So I've got 3 tent in a room, 1 hydro, 2 soil. This is my first hydro, before that I only had soil setups. The hydro tent consists of:
1,2*1,2*2m DarkRoomV2 grow tent
Viparspectra P1000 LED 3x
VKO fan 360m3/h inflow 2x
VKO fan 540m3/h outflow 2x
Carbon filter Prima Klima Industry line K1604 2x
32" 180°rotating ventillator
20L aluminium covered bucket 4x
Aquaking ak2-30 airpump 1800L/h
4 Bruce Banner Feminized 7 weeks since germination.

So the problem is the humidity. After I upgraded the first tent to hydro, I started to notice mold growing on the wall, also some humidity on the windows and walls. I had to install a dehumidifier into the room along with the AC (already been there) to control the humidity as well. The dehumidifier has a 20L tank, which I have to empty every 3 days. 20L in 3 days!! That's a lot of water/humidity. I grew in this environment before so I am 100% sure it is because of the hydro setup, had no issue like this before. Now I would like to upgrade my other 2 tent to hydro as well but I'm worried about the humidity. If this keeps going on I have to instal another dehumidifier and to be honest it's energy consumption is pretty much equal to the the lights...
Tent isn't crowded, its properly trimmed and trained. Can't figure out whats the problem.

So what to do? What's the issue here, why do I have so much humidity and how to prevent it. The buckets seals good, the only exposed area is the clay pelletts, which is not much to be honest.


ps.: Living in central europe.

TIA
 
Last edited:

exploziv

pure dynamite
Moderator
Chat Moderator
ICMag Supporter
Turn all fans on exhaust, and add pasive intakes to draw fresh air.
Same electricity, double the air movement. Also make sure to intake from some other place than the one you exhaust to..
 

crimsonecho

Member
Hi y'all!

I have a little issue here I need some help with. So I've got 3 tent in a room, 1 hydro, 2 soil. This is my first hydro, before that I only had soil setups. The hydro tent consists of:
1,2*1,2*2m DarkRoomV2 grow tent
Viparspectra P1000 LED 3x
VKO fan 360m3/h inflow 2x
VKO fan 540m3/h outflow 2x
Carbon filter Prima Klima Industry line K1604 2x
32" 180°rotating ventillator
20L aluminium covered bucket 4x
Aquaking ak2-30 airpump 1800L/h
4 Bruce Banner Feminized 7 weeks since germination.

So the problem is the humidity. After I upgraded the first tent to hydro, I started to notice mold growing on the wall, also some humidity on the windows and walls. I had to install a dehumidifier into the room along with the AC (already been there) to control the humidity as well. The dehumidifier has a 20L tank, which I have to empty every 3 days. 20L in 3 days!! That's a lot of water/humidity. I grew in this environment before so I am 100% sure it is because of the hydro setup, had no issue like this before. Now I would like to upgrade my other 2 tent to hydro as well but I'm worried about the humidity. If this keeps going on I have to instal another dehumidifier and to be honest it's energy consumption is pretty much equal to the the lights...
Tent isn't crowded, its properly trimmed and trained. Can't figure out whats the problem.

So what to do? What's the issue here, why do I have so much humidity and how to prevent it. The buckets seals good, the only exposed area is the clay pelletts, which is not much to be honest.


ps.: Living in central europe.

TIA
my dehum collects 20lt a day so 3 days is not that bad and if you want to go hydro you gotta bite the bullet and get a huge dehum. yeah they use too much electricity but what else to do.. without it my humidity is around 70 and thats not good in flowering especially.
 

stiff

Active member
Sounds like you put your old air back in the room it came from...always make sure the exhaust fan leads to the outside. Not even in any other indoor area as it will create the same problem there too.
 
Last edited:

crimsonecho

Member
Sounds like you put your old air back in the room it came from...always make sure the exhaust fan leads to the outside. Not even in any other indoor area as it will relate the same problem there too.
i recirculate air too properly sized dehum works fine in a closed room its just not feasible to exhaust the conditioned air (rh, temp) straight to outside in my case
 

stiff

Active member
Thanks @troutman ..I cant stress it enough either. All sorts of problems will come otherwise.
I'd personally never grow where I cant exhaust the air.
First of all..we all love fresh air..so do plants.
Then the mould issues, filters shitting themselves, pests settling in..the list goes on and on. Plus..I like to have a as small as possible electricity bill
 

Creeperpark

Well-known member
If your know the volume of water needed in a day in your room and you multiply that by 3 days you will find that you are putting more water into your environment than it can hold. If you can't release or remove the excess water as fast as the plants and soil release it, you can't grow without a problem. If you can't vent it you would have to pull out as much water as you put in. If you bring in 10 gallons of water every 3 days you need to remove about the same amount. Your dehumidifiers can only get so much but if it's not equal to what you bring in it may not be enough. Plant transpiration can only happen when the outside is dryer than the inside of the plant leaf. If you had hydro only in one tent without the others it may still be too much since you can't vent outside. .😎
 

Creeperpark

Well-known member
One needs to take into account the amount of water that is brought into the grow room. For 6 large 5-gallon containers, with large plants, I need to bring in 3500 ml of water per plant every 3 days. I use 5.5 gallons of water indoors every 3 days which adds up to 11 gallons or (21000 ml) of water per week. Where does all that water go? The plant uses water as a transportation system that moves, minerals, and other nutrients to and from the roots to the leaves. The plant will hold only so much water for turgidity and release the extra out of the stomata. When the transport is successful the water is transpired back into the air. If I can't vent the transpired water out of the grow room the grow will fail. Air and water exchange is an "absolute necessity" when it comes to happy plants. I like growing on the dryer side. 😎

222_1260.JPG
 
Last edited:

Creeperpark

Well-known member
The grow room size is 6x6ft. I used a large high-velocity fan blowing in the top of the door behind a screen and a large screened box fan sucking the air out on the bottom. I keep the air moving while the lights are on and in darkness, the fan comes on 30 min. every 2 hrs. Its the same for these 2 plants in order to remove the amount of water I bring in I have to use a lot of wind velocity for air-water exchange. .😎

IMG_1450.JPG
 
Last edited:

Latest posts

Top