 to AA!
In terms of lighting ... there's a bunch of options, but a T5 fixture with 2 bulbs will provide plenty of good lighting ... just make sure the bulb temperature is 6500K - 6700K. Here's a link that I think you'll find useful in terms of light fixutre location / tank depth and light intensity .. the other is for low light plants to consider.
http://www.plantedtank.net/forums/li...t5-t12-pc.html
http://www.plantgeek.net/plantguide_...=1&filter_by=2
Gravel should be fine for your purposes ... however if you feel you want to do more ... Pool Filter Sand is a nice ... inexpensive option that is just the right size to anchor plant roots without billowing into a dust cloud during water changes/ gravel vacs. What I did is just pour the PFS in the spots where I first planted ... in a matter of days, the PFS works its way through the gravel.
Aside from CO2 ... which I'll let others comment on, I use seachem flourish and seachem root tabs.
Hope this helps .... good luck!
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75g Planted
4x BlackRuby, 3x Tiger, Denison, 2x Albino Tiger, Green Tiger, Cherry, Gold, Checkered, 1 Odessa. NonBarbs -3x Cardinal, 2x RummyNose, Neon, Bloodfin Tetras & Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, 1x Amano Shrimp.
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