I agree with Jamal. Although you are increasing the total surface area for aerobic bacteria, you are not augmenting the anaerobic bacteria. You need to create a balance whereby there is both nitrification (aerobic) and denitrification (anaerobic/anoxic). The denitrification is moreso the key.
Being able to quickly convert the NH3
is good but unless the NO3
is dealt with, you will not be able to do what is being suggested. Even if this where an FO
will become dangerous at a certain point as well as the dangerous levels of nutrient that will cause health problems in the fish, primarily bacterial.
Aside from water quality, you must also be concerned about "quality of life" for the fish so to speak. The tank will reach a certain point where the amount of fish will lead to heavy aggression and fighting for territory/food.
How big is the tank and what fish do you have now?