Reddit mentions of Anself CO2 Generator System Kit with Pressure Guage Safe Vavle Air Flow Adjuster for Aquarium

Wall of text incoming for anybody looking for an introduction to CO2.

Try one of (https://www.amazon.com/gp/aw/d/B01F3FLHIK/ref=mp_s_a_1_3?ie=UTF8&qid=1502328542&sr=8-3&keywords=diy+aquarium+co2+system&dpPl=1&dpID=41wVzLINnML&ref=plSrch)[these systems] if you're doing DIY - trust me. Best €20 I've spent in the hobby by far.

I use this on a 100l (25g-ish) and have set them up for multiple other tanks of different sizes. They work absolutely brilliantly once you get used to priming them correctly and I have never once had an issue with the health or even behaviour of livestock, apart from a single shrimp's deathly dear of bubbles, ha!

The system includes a pressure guage, and a pin valve to regulate flow. You out citric acid in one bottle, and sodium bicarbonate (baking soda) in another. Add water to both, screw he bottles in, squeeze some acid through to start the reaction, et voilà. You're ready to open the valve once required pressure has developed.

The citric acid bottle is drawn from the primary bottle via a magnetic header on the pickup hose which can be lifted from the mixture using the included magnet in order to prevent further mixture.

As the acid enters the secondary bottle, CO2 is created, which then leaves. As this is pushed into the tank, you're creating lower pressure in the secondary bottle, so it will draw only as much acid as is required to continue at that rate. On top of that, the acid can travel down right into the base of the soda mix, but CO2 will only leave the bottle via an elevated Y-joint, meaning that liquid basically can not enter the tank, or at least not in any meaningful quantity.

Do it. I can't praise them enough!

Edit: I see you've mentioned looking at the older version of the product I've linked - go for this one if you can as it has a much more sturdy pin valve; the old version had a tendancy to fail after a few months.

Also, you can get it via Amazon or eBay, and they will mostly ship from China.

Man, don't let it get ya down! I run a 46g with a DIY kit and my plants look sexy af, get that and some citric acid + baking soda. I bought a cheap diffuser from china, a cheap drop checker (you'll need this, it measures how much co2 so you know if you need more or less) and quality checker fluid.

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Edit: With enough stuff to make co2 for a long time, and shipping, was prob $50 total for everything, if that

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I actually watched the video again and although there were a lot of larger bubbles, you actually had plenty of small bubbles so diffusion shouldn’t be a problem.

You’re right about it being a bad sign. Too much co2 lowers oxygen levels in the aquarium so fish try to get oxygen any way they can. Good on you for taking it out for the sake of your fish.

If you don’t have one yet, a drop checker would also be helpful to have. Maybe consider getting a device that regulates the flow.


This is a good example. Maybe not this exact one but something similar if you’re using two large bottles.

Sorry for the long response but I’ve been through this before and I thought I’d offer some advice based on past experience.

Sorry to burst your bubble but you should have done more market research. You can pick this up on amazon for $25 right now and this includes a safety valve. Adding on a check valve, bubble counter and solenoid will cost a bit less than you’re current target pricing, and they get to pick their own style of diffusing. Most people consider DIY CO2 for the low initial investment costs, either because they’re on a budget or they’re reluctant to invest a chunk of money for pressurized systems and want to try out CO2.