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Hi Falstaf,

How many Watts of lighting to do have?

Do you know the hardness of your water? The KH (carbonate hardness) and the GH (general hardness)?

Regards,
Steve Pituch
 

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Falstaf,

You should shoot for 2 watts per gallon for a low light setup. You only have .67 Watts per gallon. If you want to try co2 injection & nutrient addition (more of a hi-tech method), considering the height of your tank, you should try for 3 watts per gallon.

I would first try the low light approach. You've got to add at least one more 40 Watt bulb for a total of 80 Watts. I would try Java fern, various Anubias, and Crypts, because of your low light, as these plants generally tolerate low light pretty well, and are generally universally available.

Regards,

Steve Pituch
 

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I'm not sure, since its been a long time, but isn't marble metamorphic limestone? Wouldn't it still leach out calcium and increase hardness? I would definitely replace it.

Steve
 
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