hulkamaniac
Aquarium Advice Freak
As a way to kind of support my habit, I'm now selling inline co2 diffusers. I use one of these on my tank and it has to be seen to be believed how efficient it is. You can easily get 35 ppm in a 75g by less than a bubble per second. These work best on the intake of the filter that way not only is the water forced through the diffuser, but it's further diffused in the filter. Prices are $35 for the all black model and $45 for the snazzier clear one. Shipping is $10. The barbs on the end are for a 5/8 hose that is on the Rena XP3 (and I think XP2 as well). If your hose is a different size, let me know and I'll try to accomodate you. Get the diffuser out of your tank and give your fish more room to swim and your plants more room to grow.