RichNJ Posted November 18, 2023 Share Posted November 18, 2023 I have a 20L with a Coop sponger filter on the right and a second airstone on the left. I am adding CO2. Where should I put the the diffuser? Was worried about gassing off the CO2 if I put it near the airstone or sponge filter. So the middle? Link to comment Share on other sites More sharing options...
Mmiller2001 Posted November 27, 2023 Share Posted November 27, 2023 You want it placed in an area were flow is best for distributing the CO2 throughout the tank. You actually want to off gas CO2 as best you can and increase injection to compensate. This creates a stable CO2 level during injection. 1 Link to comment Share on other sites More sharing options...
RichNJ Posted November 27, 2023 Author Share Posted November 27, 2023 (edited) On 11/27/2023 at 11:30 AM, Mmiller2001 said: You want it placed in an area were flow is best for distributing the CO2 throughout the tank. You actually want to off gas CO2 as best you can and increase injection to compensate. This creates a stable CO2 level during injection. @Mmiller2001 So as of now I have a sponge filter on the right and the diffuser on the left, thinking that the sponge filter would pull the co2 over throughout the tank. I did increase my bps, but some of the fish started gasping at the surface by the next day, so I backed off a bit. They were back to normal in a few hours. Edited November 27, 2023 by RichNJ Link to comment Share on other sites More sharing options...
Mmiller2001 Posted November 27, 2023 Share Posted November 27, 2023 On 11/27/2023 at 10:26 AM, RichNJ said: @Mmiller2001 So as of now I have a sponge filter on the right and the diffuser on the left, thinking that the sponge filter would pull the co2 over throughout the tank. I did increase my bps, but some of the fish started gasping at the surface by the next day, so I backed off a bit. They were back to normal in a few hours. If you see Sprite water everywhere, you should be good to go. Link to comment Share on other sites More sharing options...
nabokovfan87 Posted November 28, 2023 Share Posted November 28, 2023 (edited) If/when you have the new kit for the sponge filter: Edited November 28, 2023 by nabokovfan87 Link to comment Share on other sites More sharing options...
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