Not really, because it depends on more factors than just 'x fish'. Dense planting with fast growing plants, weekly water changes, lightly fed versus 2 anubias with heavy feedings and monthly water changes for example. I'd go with 6 of each group fish, pair of apistos, and then test. Determine the level of maintenance you can keep up with...and then be a bit sparing, since I firmly believe life will screw up your plans, and a lightly stocked tank is MUCH more likely to survive than one that is right on the edge.