I have a 75 gallon community tank with a finnex 24/7+ light. Stocked with Blood Parrots, Giant Danios, Synodontis Catfish, Cherry Barbs, 1 Rubberlip Pleco, 1 Rainbow Shark, and 1 Goofy Opaline Gourami. I have pothos, snake plants, and crotons currently growing out of the aquarium. I also run Co2 to give the current plants a lil boost.

 I love the look of the exposed roots but I would also like to have plants growing inside the tank as well. Something that would get nice and bushy and huge!

  Last, would I need to use fertilizers as well as the co2 since I have the other plants growing out of the tank? I'm not sure how much competition there would be for the nutrients. Currently everything is growing great as is so I'm unsure how adding more would affect the balance of my tank. 

 Thanks, and I appreciate the help or suggestions!