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"!