Another plus working for me is that in addition to the rams horn snails there are these little burrowing cornucopia snails that I have in the gravel. When I feed the tank, they come to the surface and end up churning the gravel.
I believe theses are Malaysian trumpet snails (MTS) and yes there are great at turning up the substrate
So there is a pretty good bio load of inverts in the tank producing waste. I think the biggest trick will be balancing that load with the available bacteria in the tank to produce an adequate amount of food for the plants.
The bacteria will grow to what ever food source is avialable. As long as you slowly had more stuff to the tank the bacteria will easialy muliply and take on the extra bioload.