steelhead

My co2 is supposed to be 1 cfh per hour but my gauge wont give me that kind of reading so is just hearing a faint hiss good enough or is too much bad for the plant?

bloodysafety

I hear(somewhere here in fact) you need like 1500ppm of co2 for supplementation to be effective is a testing device feasible for you??

steelhead

My question is: Is alittle to much extra co2 bad for the plants?
Thanks for the post I have been having a hard time finding answers to these co2 issues.

bluecheese

I've never used CO2, but have read that the optimal level is 1600 ppm.

So I Googled "excess co2 in plants" and here is one item I got.

I would assume what is true globally - plants transpire less - would be true in the grow room.

__________________
cheese

Posting Guidelines -- AUP -- Sick Plant? -- Nursery Troubleshooting Guide
Plant Abuse Guide -- St0ney's pH Chart -- Reputation & Thanks

My Journals

Zait

Funny I was just reading this today: http://www.gardenscure.com/2009/01/0...ichment-guide/

Perhaps it will help you

__________________
Happening NOW: Zait's Indoor Productions Presents Hempy Blueberry

Pics of my first outdoor harvest

Rumpleforeskin

A few years ago the valve packing on my tank leaked a full 20 pound tank in my grow closet over the weekend. I was gone all weekend, so the plants just sat in the CO2 fog for two days. On Monday I opened the cabinet to find all the plants real happy with no negitive effects at all. The bad part was I had to buy a new refill.

__________________
Lets Build a Clone Machine *Step-By-Step*
Lets Build a Bubble Bucket *Step-By-Step*
My Simple Harvest and Cure *Step-By-Step*
Light Proof Mounting of an Axial/Box/PC Fan
My Harvest Pictures

LJB

I've seen two different numbers thrown around as "toxic" levels for plants, 2000 ppm and 3000 ppm. Nothing definite yet though. Maybe knna has?

Sso

transpire less?

funny...if you add co2 in a planted aquarium, you can see the oxygen coming off the plant, its called pearling and is very beautiful.

average co2 content in a fishtank is 3-4 ppm without added co2, many folks inject 30 ppm, some even go as far as 45 ppm, without harmful effect.

without the added co2, plants grow slow in aquariums. some will not grow at all *i read*
so apparantly aquariums have less co2 than most normal standing bodies of water.. or that its the sun that makes up for the co2 lack today.

i think this 3-4 ppm is normal though, having fish does not add a signifigant amount of co2 to the mix, so that makes me wonder if talking to plants works because they are listening not breathing much.

ive read that with excessive amounts of co2, lights and ferts, that it gets difficult to even see the waterplants...*now whether thats true i dont know, have no way to test that, ive only got moderately high amounts of the 3, but i can almost believe it having seen the effect co2 has on the planted aquarium.
but i dont want to really spend the money on it just to see it,
*i dont really like the idea of pruning the fishtank every day *

i think you should just start small on the co2...just a little bit, watch the plants, little bit more.

go by your plants, not what you read.sure you can go with the standard and calculate it into your room, but then you will never know what is the optimum for your plants, we dont all have equally good lungs.. strains are different too in all respects more or less.

add till you stop seeing any difference, cut back till you see a difference, having marked 'the place in between'.

when the plants are larger, try adding some more..

there is no sense in just blasting the room with co2, after all, it is poison gas...*same as oxygen really, too much will kill you, but co2 much faster and deceptive, sleepy? ok bye bye*

highly doubtful you will kill anyone though

im interested in using co2 myself on the mj, but cabdesign prevents effective use, so till i design a new one..

YosemiteSam

Is your room sealed? semi-sealed? not sealed? are you just adding a little to see if it helps? let us know what you are thinking so that we can better help.

If you are shooting for levels that truly work...1500 ppm or so you definitely need a sealed room, AC and probably a dehumidifier...if you have gone to that trouble then you should have a way of not only measuring ppm but controlling it. Guessing is not a good option if you plan to have your game at that level.

If you don't plan to take it to that level CO2 is not usually as effective as mucho air flow through the room. CO2 is just flat overrated until you take it to the level where measurement and control really aren't options.

Rumpleforeskin

I run mine at 2000-PPM. I have yet to see it toxic for the plants (humans maybe).

__________________
Lets Build a Clone Machine *Step-By-Step*
Lets Build a Bubble Bucket *Step-By-Step*
My Simple Harvest and Cure *Step-By-Step*
Light Proof Mounting of an Axial/Box/PC Fan
My Harvest Pictures