Best time to add H2O2 to rez: Deeper Ques. night cycle require more O2 than day cycle

[thinkin]

Daily adding 12.5% H2O2 +2ml to 1.5 gallons when lights turn on.

Anyone add H2O2 when lights turn off?
I did it and think I noticed a difference in growth.

I have noticed the plants grow (taller bigger) during the night hours than during the day.
Found a few other experienced growers who agree.

(My) Theory: growth requires oxygen. Is that right?
Nutes and energy can be stored.

"Growth" is a general term. Focus on growth in size.

 

[Ursus]

do you eat more food while you are sleeping? I think the same applies the the plants.

 

[Sgt.Stedenko]

Valid question, thinkin.

Ursus, Are you saying once the lights go out, nutrient uptake stops? Making the analogy between humans sleeping and plants entering the dark photoperiod is silly.

 

[olddirtybastard]

you're much better off not using H2O2 at all. the oxygen it adds to your water is negligible and short lived. better off just investing in added aeration equipment, airpumps etc...

if you want to have a dead res bleach works better and stays longer in solution.

 

[noreason]

I would use H2O2 only to fight or prevent root rot or sterilize the bucket,lines etc...but I know some (few I think) growers use it as a ''supplement''

We need to understand some things.

H2O2 has only one ''O'' atom more than water.

Water can carry a ''X'' quantity of dissolved Oxygen (DO) related to temperature,salt concentration and maybe pH too.

Over the maximum limit of DO the water can't carry more oxygen,so it will fly away in the air.

Understood this point,it's pretty clear that a good setup,wich give to the water the right quantity of air,is simply enough to give the maximum oxygen to the plants.

This is what I know about the topic.

However plants grow during the night and they do something called cellular respiration,and they need oxygen to do it.They do respiration also during the day,but in very small quantity and if this quantity rise,for several reasons,the plants make a sort of defensive mechanism called PHOTO-respiration.It's pretty common to see it in growers tents,usually just under the lamp.You can see it because the leaves becomes yellow and if things go worst they turn brown and necrotic.
This because an Oxygen atom is hooked by Rubisco in the photosynthesis instead of a carbon atom,give the plant the ability to eliminate free radicals,dangerous for the cells,but leading to dead tissues.

Sorry for the long write,I find it interesting so I wrote it

 

[Crusader Rabbit]

I once had a thirty gallon tub full of aquatic plants and goldfish where the plants had grown so much that the fish had to squirm their way through them. Early one morning before leaving for work I happened to look in this tub and found the goldfish at the surface gulping air. When I checked on them that afternoon, all the fish were doing fine, hidden deep amongst the plants. This pattern repeated for several days.

That weekend I removed a majority of the aquatic plants from the tub and left all the fish in there. After that the goldfish were not at the surface gulping air each morning. During the day the plants were photosynthesizing which involves breaking free the oxygen atoms from water molecules. Much of this freed oxygen ended up in the water for the fish to use in respiration. At night the plants weren't dumping oxygen into the water. In fact the plants were withdrawing oxygen from the water to meet their own respiratory needs. In darkness, the plants were competing with the fish for oxygen.

 

[Ursus]

Valid question, thinkin.

Ursus, Are you saying once the lights go out, nutrient uptake stops? Making the analogy between humans sleeping and plants entering the dark photoperiod is silly.

nutrient uptake is slowed down, just like energy consumption in sleep moron.

 

[Sgt.Stedenko]

nutrient uptake is slowed down, just like energy consumption in sleep moron.

Who shit in your cornflakes?
I said the analogy was silly. Others have backed up the claim that plants uptake oxygen at night. Humans do not eat while sleeping.

Sorry I hurt your feelings.

You gonna call me another name?

 

[thinkin]

night cycle

night cycle

Thanks everyone for contributing.

Feel like we made a decent breakthrough.

Think we crushed the myth that "ventilation isnt needed at night." Actually, most important time to have ventilation!

I will be amending my airpump/fan schedules.

I thank you. My plants thank you.

PEACE!

Plants arent people. Can you believe plants arent even mammals? Strict comparisons dont work well.

 

[mg75]

ventilation and h202 are two different things. you asked about adding h202 to the water at lights off...
h202 in small concentrations will help with dead-root breakup and will whiten them as well. it will help (to a point) with root-rot. some growers report a "boost" after a h202 supplementation. i have not seen proof for that.

do you have an automated system to add peroxide while the lights are off?

 

[thinkin]

H2O2.. yeah.. many reasons to use..

H2O2.. yeah.. many reasons to use..

Purpose was to find when to give the daily (one time) dose of H2O2. H2O2 is needed to keep some bacterial(unknown) problem in check. Wanted to make sure benefits of higher DO is actually used by the plant.

It was a Leading Question about what happens during the night cycle.

I was running no fans at night and only one of my airpumps. Dosed at night once. Next morning smell of fresh growth was unmistakeable. Last night, ran both (100+60)airpumps all night. Growth smell was even stronger than H2O2 dose.

No automation of H2O2. (a dripper might be a good idea) Most likely, never use h2o2 to just increase DO. maybe..

 

[Ursus]

Who shit in your cornflakes?
I said the analogy was silly. Others have backed up the claim that plants uptake oxygen at night. Humans do not eat while sleeping.

Sorry I hurt your feelings.

You gonna call me another name?

there's no point in correcting a moron, amirite? gj, yes plants uptake oxygen at night. his question was should he add more o2 during the night? It's a simple question, that I answered with a simple analogy. Of course humans don't eat while were sleeping (moron), but the enzymes in our body are still breaking down organic matter while we are sleeping. Just like how plant's don't photosynthesize DURING THE NIGHT, but are still undergoing chemical reactions in their organs. and just like how people exercise during their sleep? Are you catching my drift? It was a dumb question imo.

huge moron

 

[El Toker]

A few observations

• Oxygen isn't a nutrient.
• The whole plant uses oxygen 24 hours a day and produces CO2 as part of cellular respiration in the same way that we do.
• During lights on the green parts of the plant produce O2 through photosynthesis in quantities much greater than they consume, they also consume more CO2 than they produce.
• H202 as a means of increasing DO is a pointless waste of money. It will not increase the amount of DO. Think of it as a tax on being bad at chemistry.
• The only step beyond normal aeration of water is to go aeroponics. I'm trying this for my first run now using ultrasonic misters, and the plants are growing much faster than they ever did in DWC.
• I'm finding all the irrelevant flaming on this board really boring.

(EDIT - despite my final point in about three posts I'm going to be drawn into a battle of wits with an unarmed man)

 

[Sgt.Stedenko]

Plants have organs?
Is that where they get hearts of palm?

Who's the moron?

 

[Sgt.Stedenko]

Oxygen isn't a nutrient.
H202 as a means of increasing DO is a pointless waste of money. It will not increase the amount of DO. Think of it as a tax on being bad at chemistry.

I guess my DO meter is broken, because when I add 27% H2O2 to my res, the DO goes from near saturation values of 95% (8.8 ppm) to over 170% (17 ppm). The effect is short lived and returns to near 100% saturation after 2-3 hours.
Must be my meter and not your preconceived notions or thorough lack of understanding of water chemistry.

 

[El Toker]

I guess my DO meter is broken, because when I add 27% H2O2 to my res, the DO goes from near saturation values of 95% (8.8 ppm) to over 170% (17 ppm). The effect is short lived and returns to near 100% saturation after 2-3 hours.
Must be my meter and not your preconceived notions.

Dude I don't care what your DO meter says, it's not as though you're the first person on the planet to look at DO. People have been researching this subject pretty much since Priestly discovered oxygen in the late 18th century and thousands of papers on DO have been published since. Implying that you have anything to add to that body of knowledge on the basis of dicking around with a meter takes narcissism to a new level.

I can think of a few reasons why your meter may be measuring increased DO after adding H2O2 to your nutrient solution
- The drop in pH could affect the meter (although I think this one is unlikely)
- You're adding the (relatively cold) H2O2 to the nutrient solution and failing to mix it properly bringing the temperature at the top of the tank down, or you add the H202 when you're also topping up the tank with cold water.
- the H202 is oxidising something in the nutrient solution that results in a drop in the EC that increases the O2 saturation level.
Looking through your extensive posts on the topic you don't seem to have considered any of them.

 

[growshopfrank]

you're much better off not using H2O2 at all. the oxygen it adds to your water is negligible and short lived. better off just investing in added aeration equipment, airpumps etc...

if you want to have a dead res bleach works better and stays longer in solution.

The Bastard knows...

 

[Sgt.Stedenko]

My friend,
I've done more collective good dicking around with my meter than you have provided in your 479 posts about tight women, defoliating, and quitting drugs and tobacco.
Do you even grow? I dont see any pics to indicate you know what you are talking about.
Congrats on googling that Priestly discovered oxygen.
Later.

 

[El Toker]

My friend,
I've done more collective good dicking around...........

I look forward to the day that you publish your results in Nature to glowing peer reviews. When it turns out that you have something to add to the body of knowledge on dissolved oxygen after it's been overlooked by just about every chemist in the world over the last three hundred years you're probably going to be in line for a Nobel Prize. At that time I will write a long and sincere apology. However, in the meantime I'm going to go on thinking that you're just another gob-shite on the internet.

Congrats on googling that Priestly discovered oxygen

I'm pretty sure that anyone who has ever studied chemistry even at at secondary school (11-16 yrs in the UK) has replicated Priestley's bell jar experiment to demonstrate the existence of oxygen, it's not something that they would need to google. I suggest you stick with your current strategy of ignoring the points I made and opting for personal abuse as you're obviously completely out of your depth with the chemistry.

 

[El Toker]

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