If you are short of money, the best method is yeast (DIY) method. Very little front cash needed. But it is a lot of work. If you have more money than time, compressed gas is the best. As far as I know, the "electrical" methods do not work (at least in soft water) and the chemical methods are very expensive in the medium or long run. If you hate work and want something cheap in the short run, you can pour in a little bit of sparkling water in every day. But don't overdo it. At 11:33 PM 10/9/00 -0500, you wrote: >I was wondering if anyone can recommend what type of CO2 injection I should >use for my >planted aquarium? Which is better, an electrical method, a chemical method, >or a pressurized >gas method? and lastly, can anyone recommend any good online stores to buy >them from? And what brands are good? > >Thanks, >Eric > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >Eric Martina >University of Illinois >Electrical Engineering > > > >------------------------------------------------------------------------- >This is the apistogramma mailing list, apisto@listbox.com. >For instructions on how to subscribe or unsubscribe or get help, >email apisto-request@listbox.com. >Search http://altavista.digital.com for "Apistogramma Mailing List Archives"! -- Dave Gomberg, San Francisco mailto:gomberg@wcf.com NEW Planted Aquaria Magazine: http://www.wcf.com/pam ----------------------------------------------------------------- ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!