Jun 4, 2012 #1 1 LARA Aquarium Advice Freak Joined May 6, 2011 Messages 424 Are the necisary with a diy soda bottle yeasy/suger set up?
Jun 4, 2012 #2 Peyton Aquarium Advice FINatic Joined May 22, 2006 Messages 702 Location Milton, WV Nope, not necessary. However it's a lot easier to know what your co2 levels are with one.