Buy Now, Pay Later
As low as
$16.67
/ mo
Learn more
- – 6-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 5 left in stock, order soon!
Arrives
Wednesday, Jan 7
Recently Viewed
Color: G700S
Features
- Small Body, Big PowerThickened cylinder, bottle body is made of thickened SUS304 stainless steel, gas storage capacity equals 4L cylinder! (The package does not contain raw materials)
- Triple Stainless Steel Filter ElementMore durable than plastic filter element, Minimize the failure of solenoid valve.
- 304 Stainless Steel The bottle, regulator and the filter element are all made of high quality 304 stainless steel, more safe and durable.
- Convenient & Worriless John Guest Fit Design, 1 second quick plug high quality solenoid valve and bubble counter, low temperature and quiet.
- Use tipThe solenoid valve needs regular maintenance. When the solenoid valve can't control the CO2 flow, it needs to be cleaned before it can work normally. Please Email us for guide video: The solenoid valve needs regular maintenance
Brand: Clscea
Liquid Volume: 600 Milliliters
Item Form: Gas
Manufacturer: Clscea
Package Dimensions : 15.2 x 7.64 x 6.61 inches; 6 Pounds
Item model number : G700S
Date First Available : March 10, 2021
Manufacturer : Clscea
Best Sellers Rank: #36,497 in Pet Supplies (See Top 100 in Pet Supplies) #96 in Aquarium Air Pump Accessories
#96 in Aquarium Air Pump Accessories:
Customer Reviews: 4.3 4.3 out of 5 stars 260 ratings
Item Weight: 5.99 pounds
Manufacturer: Clscea
Item model number: G700S
Date First Available: March 10, 2021
Item Package Dimensions L x W x H: 15.2 x 7.64 x 6.61 inches
Brand Name: Clscea
Target Audience Keyword: fish
Directions: RAW MATERIALS 400g citric acid +400g baking soda + 600ml water = CO2 (Pressure≈45kg/cm²) NOTE For Safe Use Do not exceed the recommended amount of raw materials and don't add other raw materials! Better to change the water in the bubble counter every week to prevent crystals from blocking the check valve or solenoid valve. Recommended to use with a CO2 drop checker (not included). All other details are listed in the manual, please read it carefully before installation. PACKAGE INCLUDED 1 x generator cylinder 1 x CO2 regulator (with safety valve and needle valve) 1 x bubble counter with solenoid valve 1 x filter 1 x leadwire 1 x power adapter 1 x screwdriver 1 x 2m/6.6ft CO2 tubing 1 x diffuser 1 x 5mm suction cup 3 x 6mm suction cup 1 x check valve 2 x funnel 1 x base stand 1 x user manual
Color: G700S
Specific Uses for Product: aquarium plant
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jan 7
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Color: G600mini
Instructions were super clear and easy. Everything works perfectly even after 6 months of use and refilling it a handful of times
Reviewed in the United States on November 17, 2025 by TommyC
Color: G600mini
Love this thing!!!! So easy to use and setup. Doesn't come with any of the chemicals needs for the reaction so be sure and buy some. The 600mini uses about half a back of each chemical and I got a box of like 10 for 20 dollars I believe. So that's 20 refills or a dollar a refill. Be sure and get an electric timer if you get the solenoid version to be able to turn it off at night! (no need to run Co2 at night when photosynthesis isn't happening.) My only regret is getting the 600mini. I have a 20gallon tank and at the rate I'm using the Co2, I'll go through canister's worth about every 2 or 3 weeks. Plenty of time but it would be nice if it lasted a month or so, so I could be extra lazy lol. I'd go one step up in size if I could buy it over again to be able to go to a monthly recharge instead of a half month recharge in my 20g-long but I'm not complaining. You can't go wrong either way. Don't forget to get a Co2 drop checker for your tank if this is your first time using Co2 in your aquarium!
...
show more
Reviewed in the United States on September 20, 2025 by Seltic
Color: G700S
I only recently sent for another one of these after owning one for a few years. I'm now sending it back, but not because there's anything wrong with it! I never opened it before realizing I simply didn't need another one right now. However, I will say these are *great* little DIY systems, & I'd recommend them to anyone wanting co2 for their aquariums without buying the "usual" tank & regulator, plus needing to take it to be refilled with co2 when it runs out. Even if you do have such a system, this clsea set-up would be great to have as a back up for when you run out of co2. Mine starts building pressure *immediately* & is ready to use (in my experience) within 12 hours or less. Below is what showed up as a review I never completed from - ? - at least 2 yrs ago. It popped up when I was going to review the 2nd one just bought, so I'm not sure if I'm allowed to go back that far when reviewing. I'd completely forgotten that I'd begun a review so long ago: I'd done DIY co2 already with the big soda bottles & all that jazz. I was never a fan of the yeast/sugar mixtures, so had done them with baking soda/citric acid. One time a bottle blew up. Yikes! The main problem was that they just ran out too quickly & I'm too lazy to keep up with them, so I'd just gone low-tech for a long time. Then I bought some high-tech plants, & had only a single co2 tank, so thought I'd give this one a try. Once I finally got around to putting this one into action, at first I was irritated with the instructions & the bad grammar, etc. That's just typical of me, though, as it's also typical of products made outside the U.S.A. It seems like they could at least get English-as-1st-language interpreters to edit their lame instructions. The ad descriptions, manual & videos are even amusingly lame, but they do show enough to get the gist. However, the quality of the stainless tank & attachments is really as advertised. Well-made! I docked a single star mainly due to the one thing that isn't made all that well IMO: the solenoid valve is flimsy, especially the way the wires are attached. I'm not crazy about the diffuser, either, but that's a minor issue. I've had this up & running now for more than 3 months in a smaller (25G) aquarium, & it's still putting out the co2 like a champ. I did replace the diffuser with a whittled chopstick end placed to pull into a wavemaker to blow the co2 around the aquarium better. It's great how long it's lasted, & the pressure in the tank is still pretty high. With the old (pop bottle) DIY system, I think I had to change it out every few weeks or so. (Not to mention that exploding bottle experience. I'm still coming across crusted baking soda spots here & there.) All in all, it was a good buy & worth it. Recent update: I've learned that staggering the dry ingredients (1/3 citric acid, 1/3 baking soda, repeat) seems to keep it from bubbling out too soon. Also, I put ice cubes in the water & keep it in the fridge until ready to add it. Have to make sure you have 600 ml. after removing the ice cubes. Otherwise, following the directions that are right on the bottle's top works well. It is definitely a good idea to tilt the bottle about 45 degrees to pour in the water, & to do it quickly enough to prevent the reaction from bubbling out before you have time to get the regulator lid on. And do be ready to put it on immediately. The tank I bought a few years ago still looks and works like new. A warning: Don't try to clean the solenoid as recommended in their manual!!! If the instructions don't also tell you how to reassemble it, take that as a red flag/bad omen. I thought I'd try it once, & it took a long time for me to figure out how to get those tiny clips back on. I ended up using a little magnet to hold them in place & then push them down with a blade, but even then it was difficult to do. I used a small rubber band to hold the pieces together. Thing is, the solenoid didn't need cleaning at all once I got into it! I'd rather pay for a new solenoid than go to all that trouble again!
...
show more
Reviewed in the United States on November 21, 2024 by drandael drandael
Color: G600mini
This is great, the 1L lasts a bit over a month in my 6 gallon cube at 1 drop every 3 seconds. Super cheap to make a batch and you dont have to drive anywhere to fill your cylinder. Would probably need a bigger unit for a larger tank, but its awesome for a nano
Reviewed in the United States on August 23, 2025 by Paul H
Color: G700S
I searched for weeks to find a setup that would work for my tank. I decided to go with this one because of the other reviews and the fact that customers who had issues, reported that their customer service was very helpful. I have been running this tank for three weeks and have had no issues. It's nice to know that if something does go wrong, customer service will be helpful. I used the diffuser it came with at first, but I personally didn't like the look so I switched to an inline diffuser and still works great. I didn't order the ingredients from them, I just went to the grocery store and picked up the baking soda and citric acid in bulk. A few tips regarding the set up: - do yourself a favor and order a scale to measure the ingredients. You want to be very accurate here. - make sure your ingredients are not clumpy. This isn't really an issue with citric acid but the baking soda will clump up. After you measure it, take a few seconds to sift or break up any clumps by hand. This will ensure that your reaction is strong and lasts. - the first time I added the ingredients, I didn't sift the clumps and I used coldish water. I also added the ingredients in the order they say. That tank only reached ~18 kg/cm on the gauge and the reaction lasted about 5 days. However, I found that layering the ingredients, getting rid of the clumps and using really cold water yielded way better results. - you want to use ice cold water! This is very important to make sure the reaction occurs to its max potential. I place a jug of water in the freezer to make sure it's very cold (but not frozen). - order yourself a drop checker so you can be sure your co2 levels are safe. It will help you dial in your usage. You can't do this by eye, you'll need to measure it somehow. Doing the above got my gauge to 40kg/cm in about 6 hours and I've been running for almost three weeks. I do have it connected to a smart plug on a timer to make sure i keep co2 levels safe for my fish but enough for my plants to thrive. Your usage will be different of course but if you follow these tips you will maximize the reaction for your tank.
...
show more
Reviewed in the United States on July 24, 2024 by Michael