DIY CO2 reactor

[BobTheDog]

Thought I'd post a pic of my DIY CO2 reactor. It seems to work really well. Found several examples on the internet built from a power head and a gravel vac. I didn't have a power head but I did have a submersible pump laying around so I used that.

Here is how it is constructed: I got a cheap gravel vac tube and put a hole in the top, next to the existing hose house nipple. I glued an air house joint into this hole and attached a small section of hose on the inside, ending in an airstone. The line from the 3 liter bottles attaches to the outside. A small piece of hose joins the large nipple on the gravel vac tube to the output of the submersible pump. The CO2 builds up an a bubble at the top of the gravel vac tube. The flow of water from the pump keeps the CO2 from escaping and causes the water/CO2 to mix, with the water containing disolved CO2 exiting out the bottom.

Here is a pic:

 

[enchanted]

You shoudl consider adding some filter floss to the bottom. It keeps any co2 that gets pushed down, etc... from escaping out the bottom and forces dissolutoin.

Very well placed in the tank. It looks like it will hide well.