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Actually, I'm pretty sure low light tanks are ~1 WPG (watt per gallon) medium light = ~2-3WPG, High light = 4+WPG. You also want a bulb in the 6500k range. For medium-high light tanks you will NEED Co2. Whether that be by dosing excel, DIY, or pressurized -- unless you do a Walstad tank. I made my tank almost ~3 WPG for a while and despite the fact I had a DIY c02 I had an algae explosion that I couldn't control. I had to remove the c02 and lower the light to ~1.5 WPG. Algae has mostly stopped bothering me. To be honest I think low light tanks are easier to maintain. You don't have to worry as much about c02, nutrients, algae, pruning, etc. Easy plants have already stated above. I would also like to add Hygrophila, Anacharis, and Apongetons (often sold as dry bulbs). Floating plants could include Frogbit, Water Lettuce, and Duckweed. They are great ammonia/nitrate absorbers.
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