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Discussion Starter · #1 ·
I have a 65 gal. bow front planted tank w/fish. Currently I have two 65 watt CFLs on the tank which is 2 wpg. My question is, if I add another 65 watt CFL this would bring it up to 3 wpg, so would I then have start using C02 in my tank? Or would it still be okay to just continue to use ferts (Excel, etc.) and no C02?

Thanks!
 
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