I am in the process of creating a heavily planted 10 gallon tank. for the substrate I already a half and half mixture of gravel and crushed coral as a subtrate in mind, but before i put it in, I was going to ask you guys, would peat moss be a good choice to put in under the gravel? I've heard it will help the plants. Should I put the peat moss in under the gravel, or just use gravel as the sole substrate?