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Green Leaf Aquariums · 03-19-2012, 02:37 AM

In a 16g tank its hard to say exactly. I would expect 1-2 months. On a 55g I would not even consider this size, its just to small and co2 will add up. It would be best to go with a minimal 5lb cylinder.

03-19-2012, 02:37 AM	#6
Green Leaf Aquariums Sponsor (View User Tanks) PTrader: (86/100%) Join Date: Feb 2007 Location: SWAMP Posts: 4,699	In a 16g tank its hard to say exactly. I would expect 1-2 months. On a 55g I would not even consider this size, its just to small and co2 will add up. It would be best to go with a minimal 5lb cylinder. __________________ Aquatic Plant Enthusiasts Forum & The Planted Aquarium Blog & Co2 AND HOW IT RELATES TO THE PLANTED AQUARIUM.