Ogpulchra Posted November 3, 2022 Share Posted November 3, 2022 I would like to inject a small amount of CO2 into a 33g long (approx. 48"x12.5"x13"), but I'm worried about getting enough circulation to distribute it throughout the tank. I am restricted to using sponge filters and most of the stock will be tiny nano fish that don't appreciate a lot of flow. I wouldn't be worried if it wasn't such a long, shallow tank. I'll have 2 medium Aquarium Co-op sponge filters at both ends and plan on having a pretty dense stem plant jungle. I considered adding a power head next to the diffuser once the stem plants really fill in. I could also add a manifold and have a diffuser at both ends. Am I worrying about nothing? Any input or advice would be appreciated. 1 Link to comment Share on other sites More sharing options...
nabokovfan87 Posted November 3, 2022 Share Posted November 3, 2022 Trying to get a spraybar in there would be optimal. Some sort of pumphead might be necessary. Link to comment Share on other sites More sharing options...
OakenGoby Posted November 3, 2022 Share Posted November 3, 2022 This might be an option for you. You would need an external filter of some sort. Even a small canister would work. http://www.aquario.co.kr/unit/neoMixer.php Link to comment Share on other sites More sharing options...
Ogpulchra Posted November 3, 2022 Author Share Posted November 3, 2022 I am limited to sponge filters unfortunately. That's the issue. I'll probably just find other tanks to use the regulator on. 1 Link to comment Share on other sites More sharing options...
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