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DIY C02 reactor or diffuser?

This is a discussion on DIY C02 reactor or diffuser? within the DIY Aquarium forums, part of the TFK Resources category; --> a quote from the website you suggessted: " some of the components in the impellor use rubber fittings, which could be broken down over ...

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DIY C02 reactor or diffuser?
Old 02-07-2009, 04:37 PM   #11
 
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a quote from the website you suggessted: "some of the components in the impellor use rubber fittings, which could be broken down over time by the high concentrations of CO2 gas and carbonic acids present."

....so I wasnt wrong after all

my diffuser I described is identical as the bell diffuser on the website. II just have gravel on top of it so its not an eyesore. So I don't think you understood how I described it before

Last edited by ThalesthePearsei; 02-07-2009 at 04:39 PM..
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Old 02-12-2009, 10:20 PM   #12
 
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i did the cap idea only, i modified it a bit: i took a water bottle and cut off the top with the cap. that way, the bubbles have a large surface area to collect before it fills over the edges at the bottom. The bubbles will stay in the water for a long time this way. i coutned about 45 min.
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Old 02-13-2009, 02:10 AM   #13
 
I use 2 3-litre . bottles, both bottles are hooked up and I change one bottle a week alternating between the two and that gives me a consistent output. Each bottle on its own last 2 weeks but output drops after a few days. I use a ceramic diffuser found on eBay for under $10. There is no need for any needle valve or regulator because it wont make enough CO2 to do any damage. This setup kept my 36 g. at a constant 10ppm and made a noticeable difference. It actually is fairly cost effective if you buy the sugar from sams club @ $20 for 50#, that’s a year’s worth. But I got very tired of the routine and recently dropped a wad of dough on a pressurized system.
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Old 02-13-2009, 09:16 AM   #14
 
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Cool

I agree, im actually thinking of saving up for one. But the DIY still works well.
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Old 02-15-2009, 02:54 AM   #15
 
I'm pretty and resourceful. Still it cost me about $200 to put together a pressurized system. About $120 of that was for a 10# filled tank of CO2. The rest was for a used regulator, 3 needle valves, and various fittings. The tank could have been cheaper if I had found a used one, but I live in a small town and none came up over the past several weeks so I paid full price from the welding shop. Just to give you an idea.
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Old 02-17-2009, 01:38 PM   #16
 
My apologies. Clearly we were not communicating well about the "bottle cap from one my my distilled gallon jugs". As for the cavitations of the pump impellor, your risk most definitely from mechanical failure. All parts wear and fail over time but just ask anyone who has had a small leak in the pump suction how fast a little air can ruin a pump. Best of luck with you endeavors. Keep up the good dialog, that’s how we learn.
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Old 04-04-2009, 02:06 AM   #17
 
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Try this ebay sale. This is what i have and it makes realy fine bubbles. Works almost to good. I had to take it out beacuse my plants were geting out of controle. As for the bottle dont use plastic. Use a good thick glass bottle like Smirnoff or Jack Janiels bottle. They stand up right and dont flop on there side like a plastic bottle would after pressure builds.

S8 CO2 Diffusion - Aquarium Defuser Gas Pressure Tank - eBay (item 250399104896 end time Apr-29-09 20:40:25 PDT)
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Old 04-04-2009, 03:16 AM   #18
 
Quote:
Originally Posted by Evoclimber86 View Post
Try this ebay sale. This is what i have and it makes realy fine bubbles. Works almost to good. I had to take it out beacuse my plants were geting out of controle. As for the bottle dont use plastic. Use a good thick glass bottle like Smirnoff or Jack Janiels bottle. They stand up right and dont flop on there side like a plastic bottle would after pressure builds.

S8 CO2 Diffusion - Aquarium Defuser Gas Pressure Tank - eBay (item 250399104896 end time Apr-29-09 20:40:25 PDT)

Have to disagree with the glass bottle, use 2 or 3 liter pop bottles. I learned the hard way, once when I was a teenager I tried to make wine in my bedroom using a glass jar. Fermenting (which is exactly what a CO2 generator does) can make enough pressure to explode a glass bottle and that’s just unsafe. A CO2 generator shouldn’t ever make that much pressure if its working properly but the potential is there and a plastic pop bottle is built to withstand pressure and if it does fail it wont explode as violently. I have bought probably about 15 of those diffusers on eBay. They are way less expensive but only about half of them work well due to inconstancies in the ceramic disks.
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Old 04-04-2009, 04:00 AM   #19
 
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Quote:
Originally Posted by FuzzAz View Post
Have to disagree with the glass bottle, use 2 or 3 liter pop bottles. I learned the hard way, once when I was a teenager I tried to make wine in my bedroom using a glass jar. Fermenting (which is exactly what a CO2 generator does) can make enough pressure to explode a glass bottle and that’s just unsafe. A CO2 generator shouldn’t ever make that much pressure if its working properly but the potential is there and a plastic pop bottle is built to withstand pressure and if it does fail it wont explode as violently. I have bought probably about 15 of those diffusers on eBay. They are way less expensive but only about half of them work well due to inconstancies in the ceramic disks.
Ive used glass bottles for years now and never had a problem. The pressure isnt going to be enough to break 1/8 inch thick glass. the top is going to blow off first if anything. As for the pressure if your forcing CO2 through a very fine ceramic disk 2 feet under water your going to have some pressure.
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Old 04-06-2009, 02:52 AM   #20
 
Thumbs up co2 diffusor

hi,

i have a simple version of a UG tube capped at both ends, the bottom is used to bubble up the co2. the top cap is slightly enlarged to accomodate the output of a small powerhead.

the cap on the top is blocked using a sponge so that the bubbles cannot escape.

the bubbles meet the powerhead output and the result is that they are burst into fine ones. the downward / upward clash ensures that the co2 stays longer and since it is a powerhead output, mixing is better managed in the aquarium. will post the image soon.

u can also add a bio ball for better effect and experiment with the flow so that the co2 is completely dissolved.
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