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Aquarium CO2 Generator Double Runtime with Solenoid Valve 4L,G700S

Based on 274 reviews
Condition: New
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Availability: Only 5 left in stock, order soon!
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Arrives Saturday, Nov 14
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At a glance

Condition
New
Color
G700S
Weight
5.6 lb
Liquid Volume
600 ml
Item Form
Gas
Pet Type
Fish
In the box
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

Features 3

  • DUAL-PROTECTION CLOCKS: FILTER + SELF-CLEANING BUBBLE COUNTER 3-layer stainless steel filter blocks debris before it hits the solenoid. Meanwhile, our exclusive water-refill bubble counter automatically flushes the valve pathways each time you top up water no disassembly needed. Two systems working together to prevent the cause of CO2 failure: clogged valves.
  • BUILT LIKE A TANK Triple Stainless Steel Filter Element--More durable than plastic filter element, Minimize the failure of solenoid valve. Thickened SUS304 stainless steel cylinder with consistent pressure output from first bubble to last.
  • 1-SECOND CONNECTJohn Guest quick-connect fittings snap tubing on and off without tools.

Description

In 2009, we launched the world's first CO2 generator for aquatic plants tanks. It has now become a global aquatic brand. Each of our products is different from the common ones on the market. Either they have unique and practical functions, or they have excellent quality. Clscea looks forward to meeting you! We hope that our products and services can become your reliable companion on your journey with the aquatic plants. In 2009, we pioneered the first generation of CO₂ kit. We value product safety, listen to customer feedback, and continuously improve our products. With a full product line, whether you have a mini tank or a large tank, you can always find the perfect one for you. Beginner? Start with our soda-bottle generator. Limited space? Choose the Desktop 1L G600mini. Want premium quality? Go for the G700S with dual runtime. Advanced hobbyist? Pick the 4L G802S complete kit or G900S 5.5L. Still unsure? We will help you choose the best fit.

Specs 16

Brand Clscea
Liquid Volume 600 ml
Item Weight 5.6 pounds
Item Form Gas
Number of Packs 1
Package Dimensions 15.2 x 7.64 x 6.61 inches; 5.62 pounds
Item model number G700S
Manufacturer Clscea

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


Really solid set up for the money
Color: G700S
So far ao good been two weeks now after getting the system, easy startup and tuning. I have this on a kasa smart outlet set to a timer and has run with zero issues. Would recommend using glycerin in the bubble counter vs water. Two reasons for this, you dont have to top the glycerin off as it does not evaporate, and two its easier to count your bubbles and fine tune it, added bonus it looks cool. Set up is straight forward, mixing easy just layer material and pre cool a 2 liter jug of water the night before and add some ice 1 hour before adding and keep it in the fridge. 2 weeks at 1.75-2 bubbles per second on a 20 gallon planted tank seems to be the sweet spot considering my plant load everything grows at a marked accelerated rate. All components are solid, tank is of good quality and safety vave ( blow out ) is a nice feature. Good set up that won't break the bank to up your game to a "high tech" tank. Very happy with this system. ... show more
Reviewed in the United States on December 31, 2025 by urabus040

It's perfect
Color: G700S
I read the reviews and was kind of worried about the purchase and leaking parts set it up on a old used fish tank which eventually started to leak. so I emptied my fish tank and recaulked it and in the process I knocked this co2 tank off my dresser so about 3 foot, it landed straight upside down off the concrete floor. I had to bend back the glass piece bubble counter is was really crooked. I was freaking out that I just broke it after all the reviews I read no way this is about to work or work and not leak, but I was wrong it still works good and not leaking I can't believe it.i first layered the ingredients 100grams a layer using my food scale and it started building pressure instantly after adding water and screwing on the lid I'm really happy with this product. Especially with its durability. Some parts do seem kinda fragile so be careful but nothing actually broke in during my accident so obviously the stuff isn't that cheaply made. ... show more
Reviewed in the United States on February 24, 2024 by Christopher rosenogle

Muy bien
Color: G700S
Excelente
Reviewed in the United States on September 20, 2026 by Sergio Castañeda

Glad I decided against it even there customer service 24 hour didn’t respond on WhatsApp
Color: G700S
Well I can’t tell you how well it works. But I can tell you it won’t work if they don’t include the valve and regulator that closes the tank in the first place. The airline tubing doesn’t fit anything at all it’s too hard and coiled tight. You can tell they just mix matched other products u can get online and made a kit from the packaging. The lack of forethought and fitment spells it out I have a uns tank and a nice scape this is too cheap for my liking. I considered trying to find a new valve and get some type of adaptor but the other copy cat kits use male threads so I’m not gonna even bother spending more $. I’ll spend an extra $50 and get a pro regulator and co2 tank much simpler 💯. If I had all the parts I would still have had to buy better quality ones very soon. ... show more
Reviewed in the United States on October 13, 2026 by Jay David

Better Than I'd Expected & Well Worth it!
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

So far..... outstanding!
Color: G700S
The packaging this product comes in is first rate professional. I was shocked at the quality and sturdiness of the parts. Instructions were simple. After filling CO2 tank with ingredients, it was up to pressure the next morning. It has been running nine hrs a day for seventeen days and the needle on regulator hasn't moved. The needle valve for bubble counter is pretty sensitive and holds the same flow day after day. I have the solenoid plugged into a wifi timer and that too has been flawless. I would highly recommend this generator system to anyone considering stepping up their planted tank game. Tip.....fill bubble counter with food grade mineral oil from the get go, not water. You will find yourself having to refill the water every few days due to evaporation. The more we unscrew/screw/unplug the parts, the faster they wear out. I will be getting a second system for my 29 gallon soon. ... show more
Reviewed in the United States on May 29, 2024 by RBC61

Very pleased with this purchase
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

solenoid valve gets clogged and requires frequent maintenance
Color: G700S
first batch of baking soda + citric acid went perfectly. second batch clogged up my solenoid valve so it wouldn't shut off on timmer. emailed cust service. they gave me video to watch instructing how to service solenoid. followed the instructions, cleaned throughly, still didn't work. cleaned it a second time, still nothing. emailed back cust support and they told me to buy another solenoid for $20. so make sure you budget an extra $20 every time you refill, just in case. ... show more
Reviewed in the United States on October 31, 2024 by tride
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