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Discussion Starter · #1 ·
I've previously used the JBL vario (spiral) CO2 diffuser. According to the drop checker, max CO2 with this diffuser is ~30ppm in my tank. While ok, fish are not affected so wanted to try and get a bit higher to see if it will knock off final bits of algae. Rather than buying another diffuser, decided to make the Barr CO2 venturi diffuser...

My inital effort is here:


Or video:
http://s46.photobucket.com/albums/f1...t=P5200014.flv

Haven't yet intalled the loop to the intake of the powerhead as am waiting to see if I get a build up of CO2.

Having run it for 2 days, the drop checker is still blue (turquoise) and making no effort to change. Always turned pale green with the JBL diffuser.. I was hoping for yellow! Any obvious issues with my effort that anyone knows of?? I must have missed something in the design...

Thanks for your help. :proud:
 

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You might try injecting the CO2 right below the impellar instead of bubbling up from the bottom of the reactor tube. The impellar will atomize the CO2 making it much easier to dissolve. It also adds the atomized bubble right into the water stream which will aid in dissolving the CO2.
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Discussion Starter · #5 ·
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This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
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