By continuing to use the website or clicking Accept you consent to our cookies and personal data policy. For details please see Privacy Policy
Accept
How do you measure CO2?
PhunkyPhallusstarted grow question 3 years ago
What do you guys use to measure your CO2? I was thinking about picking up this meter but I'm curious as to what you guys recommend? https://tinyurl.com/2s44hdcj
like
crimsonechoanswered grow question 3 years ago
i dont see very accurate measurements without professional equipment generally on anything. be it ppfd, co2, humidity etc. so in a sense you’ll get what you pay for. why do you want to measure co2?
if you’re not providing them with co2 and pulling in fresh air from outside its safe to assume you have 400ppm co2, if not pulling in fresh air and the tent is in the house 600ppm is probable, if the tent is in your bed room or living room with the doors closed and you’re in the room for the most part of the day then in that case around 700-800ppm is a good guess.
these baseline guesses are almost as effective as a cheap co2 meter :)
Hempy_The_Kidanswered grow question 3 years ago
IMHO, you get what you pay for. Cheap = cheap. I'm guessing with your 250w led you probably won't have to worry about CO2. CO2 works best in enclosed environment with lots of light and heat.
like
Complain
Similar Grow Questions
Solved
KCChiefers
Terpinator (During Flush or Not)For those of you who use Terpinator, do you prefer using it up until harvest or do you prefer still cutting out everything during your flush? I know its' advertised as being able to use during flush so I'm not worried it's unsafe. Just figured I'd see what my fellow growers like!Week 10
Feeding. Other
5 years ago
1
1
Solved
Mospeada
Math check.Making my own bloom booster, aiming for a 0-10-10 ratio. I use powders and know that 1 tsp = 5ml. If make up a 1 litre solution, to achieve 0-10-10 would that mean 980ml of water 2 tsp of mono-ammonium phosphate 2 tsp of potassium sulphate?Week 5
Feeding. Other
5 years ago
3
6
Solved
OGgrows
do you use cannabiogen delta 9? how do you use it in auto plants? dosage forms and watering times?Week 4
Feeding. Other
5 years ago
4
1
Solved
Hansgrube
Big FAIL try not to laugh - fed my ladies with WC cleanerTry not to laugh. I accidentally fed one my ladies with a WC cleaner.
https://ibb.co/v1MNNcM
1. I noticed it 45 min later, leaves began yellow tips
2. I took it off the dwc system and flushed it.
Do you think shell survive, let her have few days in phd water or not?
Feeding. Chemical composition
Feeding. Deficiences
Feeding. Other
5 years ago
7
8
Solved
Coughy
Hydroponic PPM and feeding. How do I match magnesium sulphate to potassium for flowering??Do I got this right? Hydroponic Flowering cannabis eats at a rate of 1-1-2 and for maximum useage, feeding 1-1-2 makes sense. Extra nutes outside the ratio is wasted and extra. You want highest PPM possible before burning. Will extra Cal-Mag burn roots/leaves?Feeding. Other
5 years ago
2
2
Solved
Kushpooh
FLOWERING SLOWMy plants are flowering really slow and don't look leafy at all(were not trained)...I would like to know if there is something I can do to make them better. They are on 12h under blue LEDs 3500 lumen and at night 12h under red and blue LEDs 400.I think I need good nutes5 years ago
8
4
Solved
Nighttripper
Nutrient burn?I believe I overfertilized this week. I am using a four bucket DWS system with Reservoir bucket. This is the last week of my veg and I might’ve been heavy handed with the fertilizer. At one point my solution was 1844 ppm. I usually run itbetween 8 to 1200 ppm. I delutedd the solution in half. I didn’t have time to change it all because the lights are going out. Do you think this is nutrient burn? Thanks
Leaves. Edges burnt
Feeding. Other
5 years ago
1
3
Solved
versace_grow
Hi everyone, I would like to ask you how you test Temperature and RH. Do you put your thermometer under the direct light at the base of the plants or inderectly, because I have pretty different values . If I put it under the light my temperature is near 35°C and RH is under 20%Setup. Sensors
5 years ago
2
5
Solved
Rusticbuds
Roll callGrowdiaries roll call! Where is everyone from!?
✌️ From: Edmonton AB Canada
Setup. Other
Feeding. Other
Techniques. Other
5 years ago
16
8
Solved
iluMiGrower
Switching watersIs it ok to switch from distilled water to tap water? I started using distilled water but with coronavirus out there there's no distilled to buy! Can i just use tap water leaving in a bucket of water for 24h and then adjust the pH and good to go?!Week 2
Feeding. Other
5 years ago
9
9
Solved
Trueorganics84
Enzymatic teaShould I blend this now or wait another day?? Not sure if I sprouted them enough
Feeding. Other
5 years ago
2
2
Solved
ActioPauliana
Coco grow: the EC of my runoff is consistently 0.2 mS/cm lower as what goes in (1.1 in at this time, runoff is at 0.9). Also, PH of runoff is at 5.8, while 6,5 goes in. Is this a problem? What causes this? Its been 8 days since germination and they look healthy.
Feeding. Chemical composition
Feeding. Other
5 years ago
4
Solved
TripleCcannabis
How to flush dwcI want to do a flush of my dwc system before flipping to flower. How long do I leave my plant in the flush solution before switching to bloom nutes. My flush solution is 6ml/g ucroots plus 5ml/g clear by dutch nutrients. First grow so all tips appreciated.Feeding. Other
5 years ago
6
Solved
Adamek
BioTabs usersHave some questions to BioTabs users.When should I add the second BioTabs nutrients ? In the instruction the say it should be in the 5th week. I need to count the weeks from the first nutrient apply or 1 day of plant ? And one more.what’s the best high of the LED lamp ?25/30cm?Week 3
Feeding. Other
5 years ago
3
3
Solved
MobyDick420ESP
sulfur is good in marijuana to prevent pests like spider or trip, whitefly? can you burn the leaves?
Google TranslateFeeding. Other
5 years ago
2
2