i am new to the forum, and this tank setup is inspiring me to want to do live plants, i am wondering what the carpet type plant is throught the floor. I am unsure if i want to use Co2 or not, i dont know anything about it or how much it costs, but i presume a non Co2 tank would be much simpler. The tank i am thinking to setup is a 55gallon long plexiglass, and im probly going to go with a double llight housing hood. ive looked throught the forrum all night, but i am still very confused on where to start, and what to do. Basically i just need an explanation of Co2 injection and the costs of it, or what it takes to do a setup like the one in the link, thanks in advance.