hello, I’m thinking about starting up a new 29 gallon tank and I want it to be highly planted like my other tanks. For my other tanks I just have a very deep sand bed for the rooted plants and they seem to be doing fine. The stockingnplan will either be dwarf puffers, red eye puffers, or a large amount of nano fish. But I plan on having three inches of substrate but am unsure if I should use have ecocomplete gravel with sand on top of it, all eco complete, or just a 3 inch regular sand bed. If I do the nano fish I will have a large school of Pygmy Cory catfish. I’m also leaning more toward the nano tank.