Corbidorbidoodle Posted May 4, 2022 Share Posted May 4, 2022 I was at the CoOp a couple days ago and I saw they're using a passive CO2 bell in their big display tank. I didn't even know that was a thing! I'm really in to heavily planted, low-tech tanks. I don't really want the expense of a CO2 injection system. And I definitely don't want the maintenance. It seems cool that the plants are brighter and fill in quickly, but I only have to trim about once a month. I've also read that fluctuating CO2 is real bad (good?) for algae. And I know I'd be terrible about getting the canister refilled. Are any of you using a passive system? How do you like it? What size are your tanks? I'd start with my 55. That's the one I battle a little algae in regularly. Do you guys fill up in the morning or the evening? Can I stop using CO2 and not have my plants die? Do you still use an airstone for oxygenation? Sorry for so many questions. There are a lot of answers on the WWW, but people here are so helpful and provide personal experience rather than just something they read once. Link to comment Share on other sites More sharing options...
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