I am wanting to change my substrate to a semi fine black substrate but am not sure what should be looking for. I have a 75 gallon tank that houses african peacocks, I would like to see if i can get a couple of plants to grow in there aswell, "if my guys dont destroy and dig to badly. I wouldnt be as concerned if I was starting a tank from scratch but with it being set up I didnt know what the best options are for me do ya'll have and idea's?