CO2 Kit for Aquarium - DIY System and Diffuser 2-in-1 Design G500-Blue

This thing WORKS! My husband made a CO2 for his aquarium with this and using yeast & baking soda. It is really cool how well it works and how long it lasts!

5 Week Review: This is almost perfect for a beginner to start using C02 without a huge investment. Adjusting the needle valve can be a little tricky (especially if you have several feet of tubing between the valve and the diffuser). The instructions are just okay since there are no words and the order of operations isn't perfectly clear, but once you watch their video a couple of times it's easy to understand. The instructions are more like a reference guide or cheat sheet. Since I was being extra cautious as a first-timer, I set my bubble count to 3-4 bubbles per 5 seconds (i.e., less than 1 BPS) and the 200g/200g setup lasted about 33 days. I'd recommend you buy a drop checker to monitor CO2 levels.

Great idea, works as intended, easy to use, does the job. All sounds perfect…except one day it could’ve ended real bad. Lucky for me I didn’t have any fish in the tank. CO2 levels raised too fast, my drop checker went yellow only couple of hours of being on. Now I probably could’ve done a better job at double checking the needle valve but then again, why? I had it set to about 2 bps since day one. The pressure always read a bit above the green section but it was steady. I had the manual switch, not the solenoid. Everyday I would turn on the switch and walk away because I assume everything would stay the same after initial setup. It was perfectly good and stable for about 3 weeks, then one random morning I happen to be sitting next to my tank and look over at that drop checker. I immediately inspect the bubble counter and it’s like at 10-15 per second. On its own. I look at the pressure gauge and it’s almost near red. Again I was lucky I didn’t have any fish. Also imagine I had it on the automated solenoid and I wasn’t home. It could’ve gone unnoticed and ended bad. I had to give it three stars only for the reason to catch a buyers eye and read this review. I am a first time CO2 user, so someone could maybe try and flip this on me. And that’ll be ok. But this product is designed for the beginner who doesn’t want to invest in a pressurized system. I believe in the brand. I have purchased the 600s mini and the 900 as well. Fairly recent purchases as well so we’ll see how those hold up.!

I loved it. I followed the instructions and also found a YouTube video of the brand explainin how to set it up, well there's also a video here. Easy to use, easy to set up. 100% recommended.Update(Feb 2024):So what I wrote was true, until the needle valve stoped working properly. The first month I did everything in the tutorial, 2nd month I did the same, exactly the same but after setting it up the needle valve didn't worked properly, I checked the pressure indicator and all was relatively ok.Usually the tutorial tells you that you only regulate the valve once, then you just open or close the white switch (again first month worked like this) but 2nd time didn't worked like that, now the valve it's like broken, now I regulate the valve and nothing happens, I mean, I know you have to wait a few minutes before bubbles begin to show but at the beginning nothing happened, then I began to open it more gradually, still nothing until the valve was mostly open, it began to release the bubbles but too strong, ok I said, now I have to regulate it until I have the correct amount of bubbles and I did it but after two hours the bubbles stopped showing up. This is the problem, you regulate the valve but after a while the bubbles stopped releasing.That's the thing, I don't know if there's a problem with the pressure but so far it's been a pain in the ass been regulating the damn valve because sometimes you just turn it a little bit to open it and it's like you almost opened it completely and imagine if you do what thw tutorial says, the valve begins to work like this, you go out for some reason you go out and when you come back you end up with a dead fish tank.I was so excited about this product. Indeed it's a perfect CO2 system for someone with 0 experience but its a shame this happened to me.I'll try to record a video showing my problem but unfortunately I'll have to give it a bad review

Easy enough to set up and works well.

Product did not come with the co2 diffuser. Paid extra to have this item in the kit. Just buy the one without the co2 diffuser and save your money because you most likely won't get what you paid for.

I recommend this system to everyone who is looking for entry-level (cheap, but effective) CO2 system. Almost perfect! Could be 100% perfect if CO2 pressure measurement valve would work. Mine was broken when arrived. But still works well, I determine the pressure visually from the bubbles coming out in the aquarium :)

The media could not be loaded. I like the bottle connector part but co2 diffuser sucks! All Clscea defusers have been trash for me. Inconsistent bubbles leaks around the edges.If you buy this be prepared to buy a better diffuser. I had a fine bubbler air stone make better bubbles then this one!