Changing out my substrate in my 180 gallon planted tank, it has been in there for 10 years! Research to the point that I have just confused my self! So I ended up just chosing ADA Amazonia Soil for the first layer, then a layer of Eco-Plus, followed by a sand cap. I have never used soil base before, always just the Eco-Complete and sand. ADA puts down this Bactora stuff and a Super Clear product. Could I use Osmocote Plus in place of the ADA stuff? Are these ADA products or Osmocote even necessary?