Live Stoner Chat Lets talk Humidity
- Thread starter true
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Was just thinking, are you sure your humidity is only 20 %, that your hygrometer shows correct reading(s)?
You are running a hydro system with more than 1000 liters of heavily aerated water, and your location is not noted for.......ummmmm, un-damp ambient conditions.....seems odd.....if a 1000 liter humidifier don't cut it, I doubt what you are about to buy will make much of a difference.......just saying!
Ive got 6 metres, all singing the same song. My humidity has not really changed since going from soil to hydro. I dont think running rdwc makes any difference, the containers are all pretty much sealed.
More here http://www98.griffith.edu.au/dspace...d=DBB460E478AA7F3112C33A014E8DCB4D?sequence=1
Firstly, evaporation is a function of the rate at whichthe water vapour is removed from the air close to the water, which is controlled by windspeed (Brutsaert, 1982). Therefore, when air bubbles break up at the water surface, they may add momentum to the air, increasing the rate at which the humid air is removed from the surface. Secondly, when air is injected into the water, bubbles are formed and water vapour diffuses from the water into them. According to Burkard and Van Liew (1994) andMichaelides (2010, personal communication), it can be assumed that this water vapour reaches equilibrium between the bubble and the ambient water instantaneously (that is, the air inside the bubbles reaches 100% relative humidity). This water vapour will then be released during the break-up process at the surface, contributing to increasing loss of water.
Firstly, evaporation is a function of the rate at whichthe water vapour is removed from the air close to the water, which is controlled by windspeed (Brutsaert, 1982). Therefore, when air bubbles break up at the water surface, they may add momentum to the air, increasing the rate at which the humid air is removed from the surface. Secondly, when air is injected into the water, bubbles are formed and water vapour diffuses from the water into them. According to Burkard and Van Liew (1994) andMichaelides (2010, personal communication), it can be assumed that this water vapour reaches equilibrium between the bubble and the ambient water instantaneously (that is, the air inside the bubbles reaches 100% relative humidity). This water vapour will then be released during the break-up process at the surface, contributing to increasing loss of water.
I've read 40% during veg and 50-60% during flower.
Unless you are using LEDs in which case 40% all the way through, 80F temps in veg and 85F temps in flower.
I bought my first good hygrometer recently, a Calibre IV and also a humidifier that pumps out for 18 hours.
I'm under LED and for the first time have perfect temps and humidity for this grow so will see how it goes.
atb,
steely
Unless you are using LEDs in which case 40% all the way through, 80F temps in veg and 85F temps in flower.
I bought my first good hygrometer recently, a Calibre IV and also a humidifier that pumps out for 18 hours.
I'm under LED and for the first time have perfect temps and humidity for this grow so will see how it goes.
atb,
steely
its more humid during veg, and dryer during flowering, so other way around. reason you want less humidty during flowering is to reduce risk of, bud rot, or mold.
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