I use a Duetto DJ-50 internal filter in my heavily-planted 29gal tank:

http://www.animalnetwork.com/fish2/a...ct/default.asp

I attached the CO2 line to the hose barb. I wasn't getting quite the CO2
dissolution that I wanted, so I rigged up a plastic cup to redirect some of
the output back to the input. Basically just cut a notch out of a
large plastic cup, inverted the cup and pushed it over filter. Works
great now.

In , "Francisco Caamaño"
empowered us with this mighty blow against the
Patriarchy:

before I had as diffuser a powerhead like in this image
http://www3.sympatico.ca/c1000mg/aquarium/figure1.gif and I had good CO2
level but I had a growing white fungus at the botton where the CO2 was
coming out.... !!!! you can see this picture
http://www3.sympatico.ca/c1000mg/aqu...problem005.jpg and now I don't
have the undergravel filter how else can I make a diffuser in a cheap way
???? I also tryed the bell but it didn't give me good CO2 Level....



"LeighMo" wrote in message
...
I had a DIY CO2 and it kept giving me problems, has anybody used the
NUTRAFIN CO2 Natural Plant System ??? is it any good ????



It sounds like an expensive version of DIY to me.


Leigh

http://www.fortunecity.com/lavender/halloween/881/