I have a Co2 tank I just picked up.

I am trying to get the PPM to about 1800 in two grow tents, both 4x4x7 which total 208 Cubic feet but I am having little success.

I am using the shitty plunge and glass seringe to measure the CO2. Everytime I have measured it comes out to 300 PPM which is just the ambient CO2 temp, so its like nothing is going on.

Currently with the Cubic feet meter chart I am running 15 min per hour, on about a setting of 2 during the light periods.

I have tubing set up around all of the plants at the top of the canpoy.


I have my carbon filter running 24/7 to keep the humidity and the smell down. I am not sure but I think by leaving that on it is sucking all the CO2 out of the room before it gets a chance to settle.

I am wondering if I should run my CO2 constantly during light hours since I have my carbon filter, or should I try to increase my settings to run it every 15 min.

LET ME KNOW WHAT YOU THINK CAN REALLY USE SOME HELP

my dad can grow some weed. hes never touched a hydro system. i am planning on building a small grow room. he stressed the use of co2 tanks. how does it relate to hydroponics? i plan on growing with a homemade bubbler system. how do these 2 things tie together???? how???

why dont you post your own thread, you just asked a question of my question

yoyo, are you using some sort of cool tube of air cooled reflector? and why do you want your ppm at 1800? you should be at 1500 ppm. I just have a carbon running in the room with no exhaust. I would let it go on for 2min every 15 min. I run a air cooled reflector and it doesnt get above 73. so I keep my room sealed with a oscillating fan on 24/7. mabye invest in a co2 controller so you can set it and forget it. play around with on times and test it.

You gotta time your cycles brother, sounds like your pouring water down a rat hole.

I am using cool reflectors. I am using tents so I have a carbon filter inside the tent that vents outside, I also have another big one outside of the tent that doesnt vent out.

I was thinking about a CO2 controller but they are really expensive. Anyone have any low down on a cheap one. I mean i guess i will have to get one because why even have the CO2 that I already paid 300 for if it isnt going to work right.

you can get a cap controller for around 250 on ebay. I think its well worth it. if your temps stay down without exhaust I would seal the tent and just let the carbon run in your tent. and get an oscillating fan.

I have trouble with the temps if I dont run the exhaust for the light, and I have trouble with the humidity if I dont run the carbon filter, meaning that air is contantly being sucked out. maybe that means that I should run the co2 at all times when the light are on up to the strength where i can get it to 1500 PPM.

do you have any pics of your setup?

yea i can take some pics might have to give me a little while.