I agree with TankGirl.....that is a very efficient diffuser.
However, you can run the CO2
line into the intake on the bottom of most power heads and it will chop up the bubble and spit them out as a mist.
There are a number of things you can do to increase the efficiency on the out flow side, but you will get good absorption with just the power head, especially if it's aimed toward the bottom of the tank or set down low in the tank. This gives the mist more time to be absorbed into the water table.
, the CO2
will have no negative affect on the impeller of a filter or power head.
I've been using these methods for years with no ill affect.