So I brought a bag of miracle glo peat moss to lower my ph and soften it. After adding the peat moss to my filter, a few day later I notice a lot of algae, and slime on the surface of my water. Apparently the peat moss has fertilizer in it. I check most of the garden/hardware store, and that is the only brand they carry. I read somewhere that you can use oak leaves. Are these the brown leaves that fall from oak tree? If it is, what do I need to do to prepare it for the aquarium.