I bought a bag and was planning on using this for my first NPT but now I'm not sure. It's got an NPK rating of .10-.05-.10 and is made of Peat, Composted Manure, and Poultry Litter. Should I try using this or should I get some generic topsoil or something else? I just don't want to have to restart the tank because I used the wrong soil. Also I'm planning on using Play Sand over the soil. How deep should I make it? Thanks for the help!