G700S

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

I can't believe how long I was using the dumb old yeast+sugar reactors all these years. Never again! The measured citric acid + baking soda in a pressurized tank provides a consistent yield with no guesswork anymore and total control over the process (counting bubbles). I used the 2.4L tank for a week+ and it is working very well and the pressure has stayed consistent in tank at 20+ so I think it will last a while for my 29 gal. Getting the solenoid version was a plus as it can be turned on and off in timer with the lights. It did develop a leak in the bubble counter after a few days, and I found I was missing an o-ring (not sure if I lost it or it was never there) but the SERVICE group for Clscea company was great and came up with a replacement for it. So rest assured they support their products. The other accessories (tubing, one-way valve, diffuser) all work fine and look to be good quality.

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!

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.

Works very good and easy!.Update after 1 month: this product is really good and esasy to use, i use it at 2 bubbles per second, and it run for the whole month, even a little more on my 30 gallon tank. (Model G700s)When i refill it there was like cristals in the bottle but i think is a normal reaction, i just empty all the bottle and refill it.I never seen my plants grow so well, i recommend this product 100%.