Well I just set up a 55 gallon planted using advice from this forum. However, I also have a planted 15 gallon since forever. It contains... Java moss, java fern, anubias, and some wisteria. Be sure that you're using correct substrate, not just flat out gravel. I honestly don't know why gravel doesn't work, but most of my plants died with gravel. You should have a sufficient light fixture, 1 wpg being low, and 2 wpg will be about your max without injecting co2. Fertilizer depends on your plants. I honestly don't know much about plants though, cause all the plants I have are really hardy and easy to take care of.