Well, I was planning on using eco as my substrate in my 75 gallon. Since I've never kept plants I thought it would make up for some of my inexperience. I plan on using low light conditions and using plants from plantgeek.com's low light plants. I read this on their site "In a low tech, low light plant tank, there really is no need for a "special" plant-specific substrate such as Fluorite or Eco-Complete. Most of the plants that will survive in this type of tank just don't need it, very few will even get planted in it. Java ferns and moss both get attached to decor, anubias can be planted or attached to decor as well." Thinking about saving the $ and just using sand.