FZONE Desktop Aquarium CO2 System,45g CO2 Cartridge,5/8" & 3/8" Compatible

I bought this specifically to grow carpeting plants in nano tanks. I am currently using it in a 2.5 gallon Iwagumi style aquarium. What I like most about this is the ability to slow down the release of co2 so that you can use it on the smallest tanks. I can easily slow down to 1 bubble every 10 seconds for my 0.9 gallon super nano tank. Because it’s so small it is very convenient to use and move around. The CO2 cartridges from FZONE are large and affordable. If you want to use smaller cartridges the adapter is included. I would highly recommend this for nano tanks up to 10 gallons. I also like how easy it was to set up and how sleek and cool looking it is. This small device gives you the ability to grow every plant faster and allows for a better selection of plants that you can use. I made a unboxing and set up video (my first one ever) hopefully it helps someone or gives you a better look at how it looks and works.

If you've been on the fence about trying CO2 in your aquarium, this is a cheap and easy way to get started. Setup was quick and it started working right away. It comes with everything you need: the CO2 system itself, tubing, solenoid, and diffuser. It's also visually appealing, made of aluminum rather than cheap plastic. I'm running it on an 8 gallon fish bowl and the difference has been noticeable, plants are putting out thick, healthy growth. For such a small footprint, it packs a lot of value. Give it a try!

I bought this for my smaller 2 1/2 gallon tank and it’s perfect for that. It’s very beautiful very well-made it’s made for smaller aquariums and as long as you don’t do the bubble count too high it should last you for quite some time at least a month maybe two if you do one bubble a second but for smaller tanks, you might get away with even longer. FZone is a great company. I have many of their products and I love them. Super affordable and well made products that come with the best customer service. They are fast and responsive if you have any issues just email them and they will work with you to diagnose your issue and if you need a replacement or a new part they will send it out right away. I can’t say enough good things about FZone. This device makes absolutely no noise and it is very easy to assemble. A quick note- before you attach the CO2 tank make sure the white plastic gasket is in place. Mine came with the gasket in a baggy and the instructions didn’t mention installing it. I think it may have been an oversight in production but it happens. Other than that make sure you use CO2 tubing because regular airline tubing will not work because of the pressure of CO2. Also buy a drop checker device so you know how much co2 is in the water. Start slow and keep an eye out for fish gasping at the surface, thats a sign they are getting too much co2. It’s recommended to also keep an airstone attached to an airpump to keep oxygen in the water. Don’t be intimidated just do some research and you’ll get the most beautiful results with your plants and the fish thrive when the plants thrive. I would recommend this product for any nano aquatic enthusiast. I would recommend buying a nano diffuser as well. Thank you again FZone for another great product!

I didn’t look at the reviews or the video when I ordered this. Like many others, I tried to follow the instructions in the box, which was really useless. The co2 canister leaked to empty in a couple of days. After contacting the seller, they informed me to follow the video instructions here in the pictures, and sent me a couple of co2 canisters. It worked great with the clear seal shown in the video. I rate this 5 stars because the costumer support was super responsive and made it right, and the product is amazing, only the instructions were bad. As for the product itself, the quality is great, small and well made, perfect for my nano tank. In just a few days of using it, I’ve already noticed that the plants are looking AMAZING, and it helped lower my PH. Tl;dr: Great product, poor instructions, great customer service!

This is my second time ordering one. The first time when i received it, it was leaking the co2, so i reached out to the seller and they sent me a replacement. It worked great and still does, so i decided to finally get another one, which leaks again :( . I guess it’s a hit or miss.

I really wanted to like this CO₂ kit. It's a good size for my needs, the materials feel nice, and the included diffuser has a built-in check valve to prevent water from siphoning back out of the tank. Unfortunately, the cartridge connection has been so unreliable that the system is effectively useless for me. The original 80g cartridge leaked as soon as I punctured it, even though I made sure the correct white gasket was in place and followed all the instructions in the setup video. I unscrewed the connection and screwed it back on, which seemed to fix the issue temporarily, but a significant amount of CO₂ had already escaped from the cartridge. I contacted customer support to explain the problem, and they sent me two 45g cartridges as replacements for the 80g one. Unfortunately, neither worked as expected. The first lasted only about two days, despite there being no audible hissing or other obvious signs of a leak. The second wouldn't puncture at all, even when I applied considerable force. At around $80 for the kit, I expect the cartridge connections to work reliably and seal properly each time I install a new cartridge. The design and included accessories are promising, but repeated problems with the cartridges have made the system far more frustrating than it should be. Until these connection issues are resolved, I can't recommend it.

Great kit, includes everything needed to run C02 (for a while). While setting up my second 15-20 gal planted aquascape I decided to go with this kit instead of a C02 reactor that I use on my other tank. The kit is great, it includes a diffusor, tubing, regulator with solenoid and power supply, and a nice looking holder for the C02 cartridge. The regulator comes with 3/8" and 5/8" standard threads and adapters. The included cartridge brand new was in the middle of the green range on the pressure gauge. I'm not sure if this is typical. When I setup my CO2 reactor, I usually aim for the top of the green range to get maximum time between refilling. Time will tell how long this cartridge lasts, I'll post an update when I have time to run it empty. Buyer beware, the 80G replacement cartridges are difficult to find online. Apparently this is not compatible with UNS or Fluval 80G to 90G cartridges due to those using proprietary threads (according to Amazon AI, I didn't try myself). I suspect the only replacements on Amazon at this time are the 45G variety and tehse only last half as long. Regardless, the kit is very nice and a good value and I'm confident 80G cartridges will become available with a little searching. A couple of other notes, the include C02 diffusor is ok but requires a higher bubble flow rate and produces less fine bubbles compared to others I've used. I currently need to run 2-3 bubbles per second compared to 1 per second I use on my other tank. I'd recommend purchasing an alternate CO2 diffuser at your convenience, but this one will get you going quickly and still works, at the expense of draining the CO2 faster. I'd also recommend getting a check valve to ensure your tank doesn't drain on to your floor if the CO2 tube ever became detached.

I just set up this awesome little CO2 system for my 23G community tank. I wanted something small and easy (being a beginner with high-tech) just to give it a try and this system didn’t disappoint. The price was right and the setup was super easy. It comes with a bubble counter but I wanted a solenoid to turn it off at night. So I got this additionally. I also got the CO2 diffuser. So far so good. It looks very sturdy for its size. All quality metal no plastic. And it is so small I could easily put it in my bookshelf. See the postcard next to it in one of my photos. I already got another one for my other tank!

Great simple little CO2 system, I use it for a nano-cube in my living room where I don't want to run a full, heavy CO2 setup and it worked great. The 45g cartridge provided only lasted about 1 month at roughly 1bps but for a good looking compact setup I can't fault it too much.

Works well for nano tanks. Very simple to setup and also easy to replace CO2 cartridge. Life of the CO2 is roughly 1 month. Overall a good product and an excellent way for beginners to get into CO2.

This actually works perfect perfectly. So much better than the fluval I bought. Do not think twice about ordering this item if you want a simple CO2 bubbler for a small planter tank.

Product works great, cylinder wouldnt connect properly but FZONE customer support helped me out If the cylinder doesnt work for you Fluval cylinders work just fine!

This system is perfect for nano tanks. Extremely well made and packaged well. Instructions a bit lacking but customer service is exceptional. Much easier to watch the instruction videos on FZone website. Already ordered the diffuser and solenoid.