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Old 12-02-2014, 09:09 PM   #1
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CO2 Reactor Lesson Learned

I built a Rex Grigg style CO2 reactor over the Thanksgiving holiday. My tap water is about 7.6 PH. Diffusing CO2 with a ceramic diffuser from GLA at about 4 BPS I was about neutral (7.0). With the CO2 reactor I am about 6.6. Lesson learned: Reactors really work and they are efficient; therefore, reduce the CO2 to 1-2 BPS.





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Old 12-03-2014, 12:03 AM   #2
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I am planning on building one this week. What directions did you use? At the other forum all the pictures etc seem to be old and removed.


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Old 12-03-2014, 11:23 PM   #3
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http://www.hoftiezer.net/personal/aq...co2reactor.htm



Mine is not exactly like this, but this should give you some ideas. I did not use the bioballs either for they are unnecessary.











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Old 12-03-2014, 11:49 PM   #4
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Thanks. I have been debating if I want my top to be a straight bart and then drilling a hole for the CO2 versus a 90 degree. I assumed a 90 degree would reduce flow a bit but then again it seems like it would create more turbulence so that has to help.

Did you use clear PVC? I can't find it anywhere locally. One plumbing supply said they can get it for $10 a foot with a minimum of 10 feet.

Did you use bio balls? I wasn't going to because I don't have any and rather not buy some! I believe the original Rex Griggs reactor suggested they were not needed.
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Old 12-04-2014, 12:14 AM   #5
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I used to order pond supplies from aquatic eco-systems and they carried clear PVC. I just did a search for it (website changed drastically from what I remember) and found some clear plastic rigid tubing. Not sure if it is exactly what you are looking for or if the price is better or worse. Happy hunting! http://search.pentairaes.com/pumps/Rigid-Clear-Tubing


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Old 12-04-2014, 12:17 AM   #6
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Actually, this is a better link (Clear PVC): http://search.pentairaes.com/search#w=Clear%20PVC%20


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Old 12-04-2014, 08:45 PM   #7
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I used a Python gravel cleaner attachment. I found a bushing that fit "perfectly". I did see some clear PVC on EE Bay, but honestly the clear is merely cosmetic and not needed. The reaction takes place in the first 6 inches anyway. Plus, with a reactor, you only need 1-2 BPS.


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Old 12-04-2014, 09:59 PM   #8
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I've seen a gravel vac used for this while researching DIY builds. Clear PVC is costly. I just went from 3 to 5 bps with my current setup. I'd like to increase the efficiency and lower the bps in the process. Thanks for the post.


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Old 12-04-2014, 10:00 PM   #9
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I used bio balls.. useless?? Maybe... in my reactor forever?? Yup...

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Old 12-04-2014, 10:03 PM   #10
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LOL Brookster. yeah, I watched a few Youtube videos for guidance. I have seen absolutely no bubbles exiting as of yet.
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