Basically you connect a Rio 50+ to a LEEs undergravel tube kit using the elbow supplied with your Rio %0. The Co2 is pumped downward in a tube of water. You can stick a foam screen between the body and outlet of the Lees U/G tubing and this will trap the CO2 bubbles in the chamber until they are fully diffused. Since gas is lighter than water, the CO2 gas bubbles will return up and circulate in the tube while the water continues to flow down and out of the bottom. So only 100% diffused CO2 can leave. This is a combination of CO2 diffusor and a CO2 trap. The Rio will break the bubbles up into very small bubbles for maximum surface area which allows them to diffuse faster. Remember when you pump CO2 in your tank and the bubbles come up to the surface and escape from the water, they are actually being wasted. You can't SEE CO2 once it's been diffused into the water. So while this may seem to isolate the CO2 bubbles from the plants, it actually works MUCH MUCH more efficiently than any other system. Please decrease your CO2 pressure below the recommended ammount for your set-up.
WARNING: I've killed 2 fish and nearly a 3rd one as well by underestimating the efficiency of this system. Remember this hardly aggravates your water and the foam catches any CO2 bubbles that haven't been fully diffused. The fact that you dont' see as much air coming out as you see going in indicates that the CO2 is being fully diffused into the water before it comes out. In other words, every bubble of CO2 you see rising to the top of your tank and bursting is being wasted. The bubble should literally dissappear when it's fully diffused!
NOTE: This is in a completely clean flowerpot with brand new water. Once the foam gets a little dirty there will be more restriction and the bubbles will no longer slip through. Also, I have a activated carbon cartridge that connects to the bottom half which further slows down the flow so the bubbles stay in the top half of the plastic tube.
AquaticHeaven 10 months ago