Passive CO2 diffuser - Page 2 - DIY Aquarium Projects - Aquatic Plant Central

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Old 07-13-2018, 01:30 PM   #11 (permalink)
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Default Re: Passive CO2 diffuser

Acrylic pipe is probably the cheapest and easiest to get. Amazon has it: https://www.amazon.com/11-7-Polycarb...lic+pipe+clear To make a "tee" out of it requires some skill. And, shipping charges for things like this are pretty high. This is how I would make such a device though.
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Old 07-13-2018, 02:31 PM   #12 (permalink)
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Default Re: Passive CO2 diffuser

I can use a regular PVC Tee and extent the vertical with the clear tube.
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Old 07-14-2018, 07:02 AM   #13 (permalink)
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Default Re: Passive CO2 diffuser

I have had trouble finding acrylic pipe that has the same diameter as PVC pipe. I finally gave up trying.
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Old 07-14-2018, 07:07 AM   #14 (permalink)
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Default Re: Passive CO2 diffuser

I found some acrylic at USplastics. It's a little cheaper than PVC.
For prototyping, I might use a tube from a python water changer I don't use.
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Old 07-14-2018, 07:43 AM   #15 (permalink)
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Default Re: Passive CO2 diffuser

Oh! I found some clear 2" pvc tubing off eBay for $10 with free shipping. The walls are thin but it should work.
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Old 07-14-2018, 09:28 AM   #16 (permalink)
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Default Re: Passive CO2 diffuser

If I remember correctly, the cement that works well with acrylic, also works well enough with PVC. But, the 2" PVC tubing is the easiest way to go. This should be interesting!!
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Old 07-15-2018, 05:48 AM   #17 (permalink)
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Default Re: Passive CO2 diffuser

I've used these check valves from clippard, http://www.clippard.com/part/MCV-1BB
previously in my CO2 setup but they both failed. I guess when in contact with water (dirty aquarium water), it fails. I have a spare one but would a cheap check valve from the fish store be better?
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Old 07-15-2018, 08:45 AM   #18 (permalink)
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Default Re: Passive CO2 diffuser

I have been using these check valves, https://www.usplastic.com/catalog/it...3369&catid=489 in my CO2 system for about 3 years, with no failures yet. I have had, one in my tank, in the water, with CO2 going through it for all of that time, and it still works fine. They are made of plastics that are highly chemical resistant. Shipping costs for buying them drive up the cost substantially, but I still like them. I mistakenly bought the 3/16 inch size the last time, so it can be difficult to slip tubing over them, but they still work. The 1/8 inch size works much better.
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Old 07-15-2018, 09:28 AM   #19 (permalink)
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Default Re: Passive CO2 diffuser

https://youtu.be/VfAJ3ITS3Nw


Sent from my iPhone using Tapatalk
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Old 07-15-2018, 09:42 AM   #20 (permalink)
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Default Re: Passive CO2 diffuser

Quote:
Originally Posted by vvdo View Post
https://youtu.be/VfAJ3ITS3Nw


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yup, saw that. pretty cool.
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