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Author Topic: Homemade CO2 Scrubber  (Read 2224 times)

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Offline Reeferntraining

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Homemade CO2 Scrubber
« on: August 16, 2017, 18:19:21 »
Well since you guys talked me into an apex, I now see all the faults with my chemistry lol. I never knew I had a pH problem until I got the apex. It was getting down to 7.70 occasionally. I keep the house closed up pretty much all year except for a few weeks in spring and fall. So, obviously I have a CO2 problem that I never knew about. So check out my CO2 Scrubber courtesy of Dave and Busters 3/8" straw!

Offline Humphrey

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Re: Homemade CO2 Scrubber
« Reply #1 on: August 16, 2017, 20:36:53 »
Love it!

Offline Lazylivin

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Re: Homemade CO2 Scrubber
« Reply #2 on: August 16, 2017, 22:18:59 »
Nice job! At first glance until i read the post i thought it was a retail manufactured one

Offline jjoos99

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Re: Homemade CO2 Scrubber
« Reply #3 on: August 16, 2017, 22:33:05 »
Are you running your skimmer intake through this?  Let us know if it helps.  Ive read where it can be expensive to run these.
Jeff

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #4 on: August 17, 2017, 05:55:44 »
Are you running your skimmer intake through this?  Let us know if it helps.  Ive read where it can be expensive to run these.
Jeff
Yes. I bought 3' of soft 3/8" tubing for $8 and I bought 9lbs of the soda lime for $50. Both from BRS. I know there's cheaper soda lime out there but the BRS claims to have a coating on it that makes it last longer. I will post some numbers tonight when I get home. But so far it definitely helped overnight. The pH hasn't dropped below 8.0 and it's normally way below 8 when I get up.

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #5 on: August 17, 2017, 05:56:15 »
Are you running your skimmer intake through this?  Let us know if it helps.  Ive read where it can be expensive to run these.
Jeff
Yes. I bought 3' of soft 3/8" tubing for $8 and I bought 9lbs of the soda lime for $50. Both from BRS. I know there's cheaper soda lime out there but the BRS claims to have a coating on it that makes it last longer. I will post some numbers tonight when I get home. But so far it definitely helped overnight. The pH hasn't dropped below 8.0 and it's normally way below 8 when I get up.

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #6 on: August 17, 2017, 05:56:50 »
Are you running your skimmer intake through this?  Let us know if it helps.  Ive read where it can be expensive to run these.
Jeff
Yes. I bought 3' of soft 3/8" tubing for $8 and I bought 9lbs of the soda lime for $50. Both from BRS. I know there's cheaper soda lime out there but the BRS claims to have a coating on it that makes it last longer. I will post some numbers tonight when I get home. But so far it definitely helped overnight. The pH hasn't dropped below 8.0 and it's normally way below 8 when I get up.

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #7 on: August 17, 2017, 05:57:30 »
Are you running your skimmer intake through this?  Let us know if it helps.  Ive read where it can be expensive to run these.
Jeff
Yes. I bought 3' of soft 3/8" tubing for $8 and I bought 9lbs of the soda lime for $50. Both from BRS. I know there's cheaper soda lime out there but the BRS claims to have a coating on it that makes it last longer. I will post some numbers tonight when I get home. But so far it definitely helped overnight. The pH hasn't dropped below 8.0 and it's normally way below 8 when I get up.

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #8 on: August 17, 2017, 05:58:34 »
Sorry, I don't know why it posted 3 times

Offline joelbegt

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Re: Homemade CO2 Scrubber
« Reply #9 on: August 17, 2017, 08:53:41 »
Following this thread to see how long that canister lasts.  How many total gallons is this system?

Offline Lazylivin

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Re: Homemade CO2 Scrubber
« Reply #10 on: August 17, 2017, 10:01:30 »
Following as well. My interest is if two part consumption changes indicating an increase in growth speed. Many years ago I connected a powerful air pump outside, pumping air into tank sump. I had an immediate increase in PH. Within 15 minutes. Ran it for 6 months. In the end I so no difference in coral health or color so I pulled it out. However I did not have automated dosing at that time to identify if there was enhanced growth indicated by increased 2 part consumption. If there is benefits in calcification speed it would be seen immediately. Within in days of connecting assuming the CO2 scrubber is working and increased PH.

Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #11 on: August 17, 2017, 11:29:58 »
Brian, I did some testing prior to deciding on the Scrubber. I stabilized my dosing until I had three days of less than 3 points swing in ppm on the Hanna alk checker. I then left the windows open for 3 days. Immediately the next day alk consumption knocked down the ppm by 8 ppm. So I started dosing an additional 5 mL. I then closed the house up like normal and the pH dropped. The ppm on the alk went up 9 points. Signaling less consumption. At this point I have left the dosing regimen the same and I will test again when I get home. I am expecting to see the alk back to where it was when I had the windows open. I know this is far from scientific, but it is good enough for me. For what it's worth, I didn't notice a change in Calc, but I manually test that with the Red Sea kit.

Offline Lazylivin

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Re: Homemade CO2 Scrubber
« Reply #12 on: August 17, 2017, 11:33:57 »
Are you able to show change in PH graph in conjunction with the total 24 hour dosing amount?


Offline Reeferntraining

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Re: Homemade CO2 Scrubber
« Reply #13 on: August 17, 2017, 11:37:08 »
I could probably do that if you show me how Saturday lol

Offline Lazylivin

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Re: Homemade CO2 Scrubber
« Reply #14 on: August 17, 2017, 11:37:41 »
Have you used the same vials and retested it over and over again? For example fill one with your saltwater and the other vial with your saltwater and reagent. Then repeat test 4-5 times in a row back to back. I ask so we can see the margin of error on your meter

 

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