01-11-2010, 12:42 PM
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Those plants will grow and fill in nicely, it takes a couple months in my experience for a newly planted tank to settle and really start growing.
You have CO2 diffusion plus the fish, you do not need Excel. You will need a lioquid fertilizer to balance the light and CO2, as minerals will be lacking otherwise and plants will only grow up to the nuytrient that is no longer available to them, what we call the limiting factor. In your case it will be minerals, so a good complete/comprehensive lioquid fert added once or perhaps twice a week will provide these. And I would limit the light to 10 hours. It always takes a couple weeks for any changes to lighting, ferts, etc. to be reflected in plant growth, so be observant; it is a bit experimental at first, since not all aquaria are the same and there are many factors involved.