Ok no bulls^^t need help with humidity w/ the quickness...

Im desperately looking for a way to reduce humidity. Lights off it gets high as 62% humidity and during the lights on cycle i get it down to say 50% even.

I think im fine during the day its more the dark cycle thats gonna kill me as i can't vent out during lights out. intake only. Its the way my setup is designed but unfortunately I can't alter that.

Im 2-3 weeks in flower and need to nip this in the bud (yes "imakeafunny"...go ahead you can laugh)


I was looking for a way OTHER than getting a dehumidifier. Xmas shopping stands in my way from getting one.

Ive been told Kitty Litter (clay or silica gel based), hydrogen peroxide, damp-rid, among some other things i can't recall help reduce humidity and help prevent/fight mold.

i need to know whats good to use (and how much/when, etc) and whats to avoid.

I have lots of fans + an a/c unit im using during lights on to lower humidity. it causes my temp to dip to the mid/low 70s at times but i turn off the a/c and go back up to 78-80.

lights out is mid/low 60s at worst.



help. plz (if you need pics/etc visit my the link in my sig) or ask anything.

You can pick up a dehumidifier for like $20 used in the paper or on kijiji. .
Some are more.. but not much.

Kitty litter is $9 a pail, and not sure that would do shit.

cowell said:

You can pick up a dehumidifier for like $20 used in the paper or on kijiji. .
Some are more.. but not much.

Kitty litter is $9 a pail, and not sure that would do shit.

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i know i can buy a used one for cheap...i looked but im not looking to consume more electricity at this point.

got to make sacrifices for the greater good mate ...if u have a light proof room or a tent is in a room that u can keep dark leave the tent open abit that way u can bring in fresh and stale warm air can escape mate

kevin murphy said:

got to make sacrifices for the greater good mate ...if u have a light proof room or a tent is in a room that u can keep dark leave the tent open abit that way u can bring in fresh and stale warm air can escape mate

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i have no tent so leaving a door open = light = stressed plants. so idk how thats gonna work short of putting a hammer through the wall ceiling (joking!)

why cant u vent at nite mate

kevin murphy said:

why cant u vent at nite mate

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light cycle is during the night. lights off is daytime.

so why cant u vent in the day then have u not got a vent is that what u mean pal..if u have just turn it on during day or for short bursts during day like half hr on half hr off and so on mate

i appreciate what you're trying to do but im really looking for a way to soak up this extra moisture or make it a non-factor.

The kitty litter sounds promising if it delivers as good as ive heard it does. Im just honestly not sure how much i would need to make a noticeable difference in the dark cycle. ive heard rice works too. im not sure how much though (once again).

im hoping someone has used that (and the hydrogen peroxide for mold) and could let me know if it works and how much etc.


anyone have experience with either the kitty liter or the peroxide? does it work? how much? etc.

also...as an after-thought.

if the hydrogen peroxide really helps prevent/fight mold then realistically wouldn't the humidity not matter in the first place if i treated my plants regularly? im not saying throw out all my fans and let it go up to 80-90% or anything but it would at least let me know if i have some cushion to play here.

theres a productcalled silica gel have a look at getting that they are little packets u get in new trainers mate but u can get them in big bags cheap

kevin murphy said:

theres a productcalled silica gel have a look at getting that they are little packets u get in new trainers mate but u can get them in big bags cheap

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yeah thats the kitty litter im referring to (ive read kitty litter is made from silica gel, clay, and other materials).

how much do you think is needed for a 8x10ft room? or at least a guess?

ive heard you can also put the kitty litter in something like a sock and tie it in a knot then suspend it from the ceiling or my light rail (so it'll be in close with the plants). it'll look ghetto but whatever it takes at this point.

how about the peroxide? have you heard of that? i looked on google and seen some positive reviews for that but i dont know the correct dosage or percent of peroxide (1% or 3%) to use. if it works well for mj without hurting taste, smell, potency, etc at harvest. etc.

themanwiththeplan said:

i know i can buy a used one for cheap...i looked but im not looking to consume more electricity at this point.

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Why's that... do you have a 20,000 watt grow house you are worried about drawing attention to?

Dehumidifier if running non stop is going to draw less than 300 KWH per month.
It does what it's supposed to do. Worst case scenerio - sell a gram out of your harvest and pay the extra electric bill and save yourself the troubles with PM, mold, also - did you know that if you lower RH (into the 40's) it helps in resin production? Worth $30 if you are doing anything worth while... Venting doesn't always effect RH.. what if you live by the water and the RH of your outside draw air is is 90%? I do. It is. Dehumidifier is only thing other than a heater that lowers humidity for me. Venting will help - if you run a dehumidifier in the room you are drawing air from... other than that.. meh.

edit.. 8X10 room? are you going to control smell with a scented candle or incense?

if u have soo many fans maybe cut one out of the picture and replace it with the dehumidifier..

cowell said:

Why's that... do you have a 20,000 watt grow house you are worried about drawing attention to?

Dehumidifier if running non stop is going to draw less than 300 KWH per month.
It does what it's supposed to do. Worst case scenerio - sell a gram out of your harvest and pay the extra electric bill and save yourself the troubles with PM, mold, also - did you know that if you lower RH (into the 40's) it helps in resin production? Worth $30 if you are doing anything worth while... Venting doesn't always effect RH.. what if you live by the water and the RH of your outside draw air is is 90%? I do. It is. Dehumidifier is only thing other than a heater that lowers humidity for me. Venting will help - if you run a dehumidifier in the room you are drawing air from... other than that.. meh.

edit.. 8X10 room? are you going to control smell with a scented candle or incense?

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nothing more to read past the part highlighted in bold. you should know that they do NOT sell you out to the cops because you run a 20K watt grow op. Not that i run 20K watts...i only use 2 600s and a t5 fixture for small plants/clones/seedstarting. hardly a "20K grow op" thats gonna get the cops knocking at my door.

(note: the electric company NEVER informs cops of high electricity usage! only if the electricity is being stolen or the customers aren't paying up)

did you ever consider i might be running as much energy as i safely can without a major electrical upgrade or risking blowing something/starting a fire? im playing it safe. so what?

you'd think between those 2 600, the t5, the air conditioner, the 5 fans and everything else that runs not related to the actual grow that i might be close to that threshold. Im safely under and thats how i'd like to keep it.

So before you go attacking me in my own thread (in which im just trying to get some humidity help alternatives) learn your facts.

Do it right, do it light. Do it wrong, do it long. That's my motto.

hence the sarcasm.. you can't read it in bold... but it's there.
You aren't running a big scale op?.. no shit... hydro isn't a worry to you.. get a dehumidifier and solve your problems.
running a space heater would cripple your house? that's 1500 watts.. I'm saying something that runs 1/3 that.

Electric companies 'NEVER" contact cops??? I think you are misguilded sunshine. Do you have inside info what the cops do? The E - company in my area have led to alot of ops being nabbed. not stealing electricity.. smart meters- dumb ass.

Mind you I agree.. with a smaller op - pay your bills and even up to an 8k grow is fine... we aren't talking about that.. cause you said you can't spare the electricity to run a small appliance without raising suspicion - right?

how the fuck are you only running 2 600 watt lights and think you are in danger of setting your house on fire? maybe you should look into shit yourself bro.

What ever.. use the silica gel packs outta your beef jerky packs then.. I don't care. Was just trying to help and you know better right?

Best of luck.

who fucking attacked you?

^^^ +1

Seems like people come on forums, ask questions, and when they don't get the answer they're looking for, they get bent out of shape and act like everyone is treating them like an asshole.

themanwiththeplan said:

i appreciate what you're trying to do but im really looking for a way to soak up this extra moisture or make it a non-factor.

The kitty litter sounds promising if it delivers as good as ive heard it does. Im just honestly not sure how much i would need to make a noticeable difference in the dark cycle. ive heard rice works too. im not sure how much though (once again).

im hoping someone has used that (and the hydrogen peroxide for mold) and could let me know if it works and how much etc.


anyone have experience with either the kitty liter or the peroxide? does it work? how much? etc.

Click to expand...

Rice does work but you need A LOT of it. Have you tried useing dishwasher salt? That works well. You can also use table salt. If you dont like the idea of any of them you can buy moisture boxes for £0.99 or buy some of this stuff

http://www.ebay.co.uk/itm/NEW-Kilrock-Refill-Moisture-Trap-Absorber-Crystals-500g-/310304180769?pt=UK_HomeGarden_CLV_Cleaning_CA&hash=item483f920a21#ht_3439wt_905

Hope this helped!

Lights off it gets high as 62% humidity and during the lights on cycle i get it down to say 50% even.

***I think im fine during the day its more the dark cycle thats gonna kill me as i can't vent out during lights out.intake only.**


I have lots of fans + an a/c unit im using during lights on to lower humidity. it causes my temp to dip to the mid/low 70s at times but i turn off the a/c and go back up to 78-80.

i have no tent so leaving a door open = light = stressed plants. so idk how thats gonna work short of putting a hammer through the wall ceiling (joking!)


***why cant u vent at nite mate*** -Kevin

***light cycle is during the night. lights off is daytime.***


if your stuffs not on during the time u need the dehumidifier how are u at risk when running more electrical?