06-25-2009, 03:21 PM
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Originally Posted by saulat
Oh no, I upgraded to a 55 gallon tank.
Then you have two 15w tubes (or 30 waqtts total) of light over a 55g tank. Definitely don't waste your money on a CO2 system. According to those who have it, and what the plant experts have written in books and magazine articles, you would need a minimum of 150 watts and preferably 200 watts of full spectrum light over a 55g to make CO2 practical. As i've said before, the plants cannot use the CO2 without adequate light. Better to spend money on increasing your light fixture to accomodate a minimum of 60 watts of light. If you decide on this, look at the new compact fixtures, you get more intense light with less watts so it saves energy and money (and heat).