Need CO2? Build cheap, fast and easy DIY CO2 reactor! 

Are you using CO2 in your aquarium? Let us know in the comments! 🌿🌱

What I always do: before adding the yeast, activate it by dissolving it in a small cup of lukewarm water. Then pour it in the bottle. Add baking soda to prevent drastic PH changes and prolong the life of the mixture. It's more effective and speeds up the process. Thank you for your video!

Fish getting drunk off the homemade hood stuff

I'm a brewer and I never thought of this... Shame. Great vid

If you use some sort of malt or grape juice instead of just sugar water with the yeast, you can brew yourself a beer/wine while you carbonate your tank.

In theory, you could use a three way valve to divert the CO2 somewhere else at night. There ate many ways you could automate the day/night cycle if you didn’t want to carbonate 24/7. I like those Globe smart wifi outlets for automating on/off cycles.

Should always hydrate your yeast before you pitch into the sugars, you will get a better result.

Add Agar. 250g sugar, mixed into 500mL water. Add Agar powder. Boil and reduce it until only half left (250mL). One bottle of it should be enough for a month. PS: there's no need to care about bubble per second-BPS. If you have a good reactor (can be made with PET bottle, kaldness micro, and small pump), even 1 bubble per 5s will have better result compared to diffuser, which literally only _releases_ tiny bubbles into the water, and not truly _diffusing_ the CO² through water vortex. PS2: only use *baking yeast* , as in what you use to bake a cake. Different yeast will produce different result. PS3: You can also a tiny bit of baking soda into the yeast mixture. Just a little, not even a half teaspoon. It helps activating the fermentation process faster

this is...this.....is HELPFUL

You can use sugar gelatin instead of water and add warm water with yeast on top and it lasts way longer

How big of a tank is 1 bottle for? Also how can I turn it off at night?

may using also for grow room (small) for plants?

I try using 1 liter bottle ,500 ml water + 250 gr sugar + 2 gr yeast + 2 gr baking soda , for 1 - 2 weeks and 24 hours on

Love a good diy!

could you remove the diffuser at night, and let the c02 dissipate, if you don't have an air stone running to provide oxygen?

Just got mine today diy 😅❤

I link my home brew beer to aquarium once

Airsoft players need this🗣🗣🗣🔥🔥

What do you do at night? Doesn’t it kill fish if you leave it run? Also how to you know if your putting a lot or a little in? Wanna start using it but don’t know that much about it

1. Use 2x 2-2.5litera of cola, fanta pet bottles - strong plastic 2. Use a small bag of alimentary jelly and you pour into the east receipt

Very helpful! Where can I buy those bottle cap and valve for bubbles?

Kool video

Yeast isn't a fan of light, so cover that bottle is a good idea too.

Do you NEED to use fertilizer in conjunction with co2? I've read you may not get the desired effect if you use co2 without the inclusion of fertilizer. Is this true? I'd rather just use co2 without adding ferts into the mix, since i have a planted turtle tank and dont want to harm the turtle with too many chemicals.

Can i just pour the solution in water on small doses

do you have it on 24/7? how do you turn it off, say at night time, without the bottle exploding from all the building pressure? thanks! God bless you!

If i already have a bubbler in the tank, could i just use that as a diffuser? I could just take the tube off the air pump and put it in the second bottle, right? Then, i could just put the tube back in the air pump if i dont want a 24/7 CO2. Yeh?

Where is the other tube connected to

I prefer baking soda/citric acid. Or soda and vinegar if I’m really poor.

Hey thanks for the video! One question, can I use bubble counter instead 2nd bottle?

Can we use air stone ?

Could i do this for a 7.5G with decent surface agitation?

Anyone else here trying to make co2 so you can make fry ice?

can vinegar and bakin soda work too

How would i stop it tho im planning to do it for my future tank could anyone help me by helping me out on how i could stop it but like to keep the co2 in bottle for next day so i wouldn’t lose as much

Also, a quick and in a hurry solution: Baking soda and vinegar.

Im using baking soda and citric acid

wow amazing.

How many days does this mixture last?

doesn't plastic tend to leech into the water? if so would this really be a good idea?

How many days or weeks does this much works?

❤❤❤❤

what brand which diffuser are you using?

How long does this last. A few days?

You have shown that DIY CO² Working with a diffuser...does it really work at Diffuse? For experience It will never work this diffuse

Is this too much or enough for a 5gal tank? And how long does this last?

Nice video. For how long 400 gm sugar will run ?

how do i figure out if dis is working, or killing fish

How often should it be changed?

How do you know whether you will overdose the fish?

Please tell me if I give this to my tank 8 hours a day how long this will last ???

I tried this and i cant get bubbles from the diffuser. I get one bubble from 2l bottle every 15-20 seconds and none from the diffuser. Must be doing it wrong or got the wrong diffuser

Is it a kind of cstr?

Wow i thought that i should add gelatin to it. Thanks for giving another method

How long will it last

What kind of yeast

'How dare you' -Swedish girl who didn't attend school

Haw many day It Can work?

How much time it take to start , i followed your video and tried to do it , but how long i have to wait to see co2 is coming

How long does it last?

how long it last

Is instant yeast ok?

Is it okay to clip to hose at Night? Because i dont want it to run 24/7

Why connect the yeast to the water bottle?

i hjad those bio reactor running for a long time. They are cheap and easy to build, but comes with some disadvantages: 1. they dont give a constant amount of CO2 over their lifetime. Its too much in the beginning and after a few day its way too less 2. u cant shut them down over night via a magnetic valve, the pressure will grow too high. shure you could let the CO2 flow into the room, but its smelly 3. cleaning it up can be a mess 4. its not producing enough pressure to run a regular diffusor wich leads to low pressure diffusor wich cant produse the fine bubbles you would need. 5. Space. If you want to run them on a big tank you will need a very big Reactor. 5ltr minimum, if you want it to produce enough CO2. For Nano-tanks they are fine, if they dont overdose, since it will lead to your fish simply die away over night. I would recommend them for small plant-only tanks. But from my experience i can say, that it is more useful to spend the money on a regular CO2-system

Sorry but worked any for 4 days

Lmao carbon dioxide through fermentation, definitely a first

If you put more sugar will it last longer?

You forget 1 ingredients… baking soda powder… put 1 tablespoons of it… it gonna last longer…

What’s CO2???

I tried this and ended up with HUGE worms in my bottle

How long ?

Thats not 1L

you dont need yeast, just fill it with aquarium water. or just use aquarium water+crush fish food.

Too complicated. 1-bottle method is easier to maintain and produce the same results ;)

Fake. Not enough pressure to push the co2 gas.

How long will it last

How long does it last?

can it run 27/7?