fibst CO2 Diffuser for Aquarium, Excellent CO2 Solubility Ensuring Vigorous Plants

Compared to all of the other diffusers I used, this is my favorite so far. The quality is great, really sturdy/solid and beautifully designed. I did not have to worry about putting on the CO2 tubing (the black rigid kind) and breaking the diffuser like some of the ones that are made out of glass. The bubbles are fine and evenly dispersed (some of my other diffusers have various size bubbles coming out of the ceramic membrane). No cheap plastic suction cup to hold the diffuser in place either. This works well with my rimless tank, but on my larger braced tank, I had to cut a small piece from the aquarium bracing for the diffuser. This is because the curve at the top of the diffuser can only support 1/2 and my aquarium + brace is 3/4 inch. Cleaning the diffuser is easy, just unscrew the top and clean the ceramic membrane without worrying about breaking anything.

My local independent aquarium supply house had a similar item but not as long (deep) so I had to find this online. My aquarium is 24 inches high and it is important to get the CO2 diffuser as far down in the tank as possible so the tiny CO2 bubbles get dissolved in the water before reaching the surface. This item works well with my new beer keg regulator and CO2 tubing. I can see the small bubbles coming out of the diffuser disc like it is supposed to. My one complaint about the seller is that they need to offer replacement discs at a reasonable price. I was able to buy a ten pack for about twelve dollars from a different seller on Amazon that fit this unit perfectly. I like to change out the discs when I clean the aquarium and clean them with a mild solution of bleach and water then rinse them and dry them for use another time. Would I buy it again ? Yes. I think it's a very good product that is attractive and WORKS properly.

Your browser does not support HTML5 video.  This is my first time using c02, and this diffuser works great for my application; I have a 32 gal tank, with snails and fish. Instructions say to soak for three hours but it was at least 24 hours before I could get back to it after hanging it in the tank. After completing setup I turned it on and....voila!! Tiny bubbles! The instructions stated initially bubbles would be big but would settle down after a couple of days to tiny bubbles. I think the extra soak time probably prevented that situation. The only problem I have with this diffuser is the shape. I liked the look of the long neck with hook at the top but it doesn’t fit over the edge of my tank very well. My tank is Bio Cube and we’ve removed the hood and placed a Finnex LED light on the open top. The rim where the hood closed is pretty thick, and the hook of the diffuser isn’t wide enough to fit easily. It doesn’t bend easily and would possibly break if forced. I’ll use it until I get a different one, and will keep it for rimless tank setup later on. It does work well!

The diffuser seemed to be in good condition upon opening the package. However, with pressurized CO2, even the smallest gap or defect in the tubing, diffuser, valves, etc. will result in the CO2 leaking. It took me about 15 minutes to install the diffuser with my system and upon switching it on, there were giant bubbles coming out of the metal tube just below the ceramic disk. Upon closer inspection, I saw a tiny scratch in the metal, which seemed to just slightly perforate the tube. This was enough for all of the CO2 to leak out as big bubbles and not be diffused by the disk, making the product completely useless. You should test your products before shipping them.

Just installed yesterday so it seems early to give 5 stars however, this is a nice co2 diffuser. The simply fact that I can easily remove the ceramic disc for future cleaning makes it better than another nano sized glass pollen diffuser I have. Also this diffuser is longer and while it exceeds the height of my planted Spec V, it has a high quality metal clip that slides up or down the length of the diffuser allowing for easy and secure height adjustment. One thing I’d love that would make life easier is if it came with a spare ceramic disc for between cleanings.

I have a DIY CO2 generator w/ citric acid and baking soda. I followed the directions preparing the ceramic disk before use, but was never able to get adequate bubbling from the diffuser even with 3psi pressure built up in the generator bottles. I even tried to run a standard air pump to see if that might help; but even then no gas would flow through. I am not sure if there is a welding bead occluding the shaft or what; but it never worked for me. It is a shame because it is a great looking diffuser; just not functional.

I love that this isn't glass, it's stainless steel. My first one I soaked for 7 or 8bhours before I hooked it up and although I got some fine mist from it, there were too many large bubbles for me. I contacted the vendor who sent a new one out immediately. I works perfectly.The only thing I don't like is it doesnt fit over the frame of my tank. I didn't want to "cut" a notch in it because I didn't want bits of plastic getting into my tank. I used a soldering pen to melt a spot just big enough for it to fit in.

I swapped this out for the one that came with the fluval mini 20g diffusor and it works great! I followed the instructions of tightening it and then letting it sit for 3 hours in the water and when I turned it on presto everything was up and running! Tiny little bubbles came out and moved around the tank! This is my first planted aquarium so I'm loving the price and simplicity of this bad boy! Does anyone know how long the tanks will last roughly?