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Originally Posted by db8  sorry, it's the 18w current usa satellite CF 12". so, HC would have problems... hmm... |
So you effectively have 9W over 5G. Sorry, but your only going to be able to grow moss, ferns and other lowlight plants. I actually have the same light, but with the freshwater bulb over a 3.5g and I was able to grow HC using excel and a good substrate.