I am new to this forum and first of all I just wanted to say this is by far the best forum for planted tanks out there... I am getting ready to switch my tank to a planted tank. I have never done a planted tank before so I am completely new to all of this, I Have a 105 gallon tank it measures 48in Long 18in Wide and 30in tall. My light is ordered and being shipped i have my DIY CO2 reactor all i need basically do is start looking at plants. I used to have South American Cichlids in my tank 3 very large oscars a bunch of others needs less to say my nitrate levels are off the charts. I would like to start a planted tank and i was considering switching from gravel to sand. What would be the better choice for a beginner?