is co2 my problem ?

Hey guys , iv recently had problems with temps and water . temps being far too high and the water being too hard ( i believe ) i now have the temps pretty much sorted although they do fall out of the required ranged now and then . 16'c to 33'c sometimes. My plants were yellowing and very limp so i then changed to bottled water and they have done very well with this turning green quite quickly . but i still have a slow growth problem ?? Now either my temps are really affecting it or its the air circulation. I am growing in a grow tent inside a shed . the shed being around 2.5m2 and the tent 1.2 sq. I have intake and outake fans on but they are both pulling air from the shed not from outside (fresh air) could this be the problem ? The idea of me not having fresh air is because the window is in a public area so didnt want to attract attention . what would you suggest peeps ? Thanks

Also i forgot to mention that i believed it to be stress on the plants why they were growing slow now but my friend took 2 of them and they are already growing far more than mine

How old are the plants? What stage? Nutrients? Medium? Co2 is not the problem

I'm sorry, I'm on my phone and at work so I don't really have time to look at a converter but temps should be between 70-80F without Co2. I like to keep it around 76. Some people say even up to 80-83 is fine. How far away are the lights? What kind of lights? Light burn and heat stress are very different

Get your temps in check, but that shouldn't halt growth until it's around 29-30 c. If you don't have fresh air circulating into the shed, or a source of Co2, there will be minimal growth after the plant(s) have consumed the available co2 (it's required for photosynthesis). Go get yourself a co2 bag from a garden shop or look at home-remedies for co2 generation (i.e. dry ice) and see an improvement. Co2 supplement allows one to cheat temps a little and boosts growth.

stankyyank said:

Get your temps in check, but that shouldn't halt growth until it's around 29-30 c. If you don't have fresh air circulating into the shed, or a source of Co2, there will be minimal growth after the plant(s) have consumed the available co2 (it's required for photosynthesis). Go get yourself a co2 bag from a garden shop or look at home-remedies for co2 generation (i.e. dry ice) and see an improvement. Co2 supplement allows one to cheat temps a little and boosts growth.

Click to expand...

You probably dont need co2 supplements unless in a sealed room. Shed does not usually mean sealed. I would search for the real issues. Nutes, ph, light!

pictures go A LONG WAY here

Thanks for the replys people . my temps stay around 21-30 now which is better but still a bit high , iv managed to get a better source of air into the tent but its still not perfect . the light is at the highest it can go at aroun 4 ft away from them . ph is 5.8 and i believe i also have over watered them , so at the moment im going to water less , i have better air coming in , i will add some liquid oxygen for the roots incase they are suffocating and the light is further away to hopefully bring the temps down . hows that sound guys ??

i doubt co2 is a problem, personally i dont waste time with intake fans, i just use good extraction and then have passive air intake

But the shed surroundimg my tent is small , so all that was haplening is the air from the shed was getting used and pushed back into the shed and never replenishing

So the shed is air tight? But yes ventilation is a good thing. I also just use passive intake and that way my shed is always in a negative for odour control.

In saying that I just bought a CO2 controller wooo hooo, lol.

waterdawg said:

In saying that I just bought a CO2 controller wooo hooo, lol.

Click to expand...

Price ??

tashed said:

Price ??

Click to expand...

$230, its a Honeywell, not sure of the model but its pretty cool and I can set it up to modulate the valve depending on the ppm's using a DC step-valve. For now its on and off though lol. Lots to consider re heat control and lack of venting.

waterdawg said:

$230, its a Honeywell, not sure of the model but its pretty cool and I can set it up to modulate the valve depending on the ppm's using a DC step-valve. For now its on and off though lol. Lots to consider re heat control and lack of venting.

Click to expand...

Cool , way to advanced for me right now , iv got to have some survive first lol

Are you growing organic? I'd advise against the h2o2 if you're organic, as it would most likely kill all of the beneficial bacteria that breakdowns the soil and releases nutrients for the plant to uptake. How's it looking since over watered?