What can I say. This just like all there products are great. Long lasting and great prices. Thx coop

I've been using the aquarium co-op regulator for about 3 months now. It's been pretty effortless in running. Once you get it set up which wasn't hard at all, the manifold allows you to make fine tune adjustments on the bubble counter and is highly precise unlike others.

Easy setup and works as expected One word of caution, I over tightened the screws and broke one so don’t make them too tight. Aquarium Coop was very friendly and helped me resolve the issue even though I caused it. I like that they have YouTube videos to make it easy to see how to setup.

When I heard that Cory might not be selling the CO2 regulators any more I knew I had to snap up at least 1 more expansion manifold. I love the regulator and manifolds Cory made and they are quality pieces of equipment. Hope he keeps at least offering the expansion manifolds!

Great regulator. I love that I can add manifolds for relatively cheap and add to the system. I do wish the mating surface for the tank was made of steel, as I over tightened it some and chewed up an o ring and scared the aluminum some. That's not the fault of aquarium co-op though, just me. I'll be adding another tank in a separate room this summer and I'll be purchasing another regulator when I do.

I wanted to add another tank to my aquarium coop regulator and this does exactly what is says!

We have purchased 2 regulators, both stopped working within 2 weeks. It’s a total bummer because the design is great but there appears to be something wrong with some of the actual regulators.

The great thing about Aquarium Co-op is they will honor their 1 year warranty.

Allows better expansion to other systems!

Product works very well. This is the first CO2 system I set up and I had a few setbacks along the way. Aquarium co-op is 3000 miles from my house but they were right there for me every step of the way. This is why I will gladly pay shipping to give them continued support.

Well made. No leaks and easy to install.

Perfect! Just what I needed!

This is a great value and the unit has a matching finish to the regulator. Thank you Co-Op for keeping the price reasonable!

Does what it is supposed to and easy to install.

I broke screws over tightening so dropped a star.

Other than that no complaints.

Pretty easy to install and works as intended

I'm not doing a review of everything individually. Ill just lump it up here. I got 2 of these. Only using 1 at the moment, but its fantastic. Workd great.

I also got a co2 check valve. Works fine. Another diffuser. Also works great. As well as the curved scissors. I haven't used them yet, but suspect they'll be just perfect.

Works great. No leaks. Easy to install.

Took three minutes to install. Second CO2 tank up and running…

Be careful not to over torque the screws or they will break. Otherwise its a good product.

Works great. Super easy to install

So these are really solid. They come with all the hardware you need to install it. The instructions are very clear. It's really easy to setup. The whole c02 lineup is really easy and seems to work really well so far. I've had one issue, but support walked me through the issue (thanks again Candi).
I will say that the bubble counter isn't the most solid component. The metal feels more like plastic, and it kinda digs into the air line. That being said, it doesn't cut the airline and it does its job perfectly fine.

My overall opinion: i dont think you could find anything of similar quality in this price range. The corners cut to make it this cheap make sense, and aren't glaring issues like you would find on other models. I will be buying more of these in the future.

I have a 125 planted tank with fish. I have been trying to figure out how to get better dipersal of my CO2. The CO2 Regulator was the answer. I am very happy with it.

Arrived earlier than expected.
Easy to install.
Works great!

Works perfect and easy to install. Easy 5/5

I have a planted tank and they have seem to be struggling and getting algae. So after watching Irene from (girl talks fish ) and setting up the system I decided to give it a shot and the set up could not have been easier. Now I just have to wait and see what happens..

Additional output for your co2 regulator. Attaches easily and works just like the og. I added 3 so I can supply 4 tanks individually

Very fast replacement and works well and as well as more expensive unit

Good quality, fair price, easy to assemble and install

I like the idea I can add extra manifolds to the regulator. I bought one extra and thinking about buying 3 more. So far the use has been easy mostly. Being new to co2 use I’m not sure what level this system is on as far as quality and features.

This makes expanding your regulator super easy. I have used multiple products from other vendors to split co2 lines and this is the best. Very simple setup.