Most, if not all, of the well planted tanks that I have seen have had rather small, docile fish in them. I am guessing that it is because a lot of fish like to use the plants as appetizers? Has anyone ever used a piece of glass to create a rear compartment 3-4" long that runs the whole length of the tank and planted that heavily....then put the fish in the front part of the tank? That would keep the fish from nibbling on the plants, which would allow the plants the opportunity to do their job and filter the water and create O2, etc.