My 30 gallon planted tank - neon tetras and fantail guppies

My 30 gallon's cabinet is already packed with stuff and my 75 gallon is just a metal frame with no doors -- would be a total eye sore. :(
Now I'm scared it's going to blow up while its under my tank.. . hahaha! (no, not really.. . well, maybe a little)

How much does it cost to fill a 10 lbs tank?
 
That does sound kind of expensive.
How long does it last you?
 
I'm glad you caught that.
I end up googling to see what's the difference between the two and I just saw the red part of the neons is only partly red.
Thanks!
 
That does sound kind of expensive.
How long does it last you?

Sorry for delayed answer, haven't logged on in awhile. I got tired of mixing up DIY yeast and sugar and figured in the long run the cost isn't that bad if a co2 tank lasts several months to a year as I've read. I've only had it for 6 weeks and running about 2-3 bubbles per second and the tank still seems full.


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