Natural Nitrate removal

My concern is more about PO4, but yah! Clams 4 the win And they look COOL to boot, hehe.

 

Let's see if I can synopsize what daColts has described:

Siphon or pump water out of the tank through airline tubing. The tubing goes into the top of a water-tight container and coils around and around the inner circumference of the container for 50 to 75 feet. Aerobic bacteria live in this coil of airline tube and will use up all of the oxygen, if the water flow is slow enough.

Then the water, now totally lacking in oxygen, leaves the coil of tubing at the bottom of the container and slowly bubbles up through a high-surface-area media. Anaerobic bacteria will live on the media and consume the nitrates in the water. Another airline tube near the top of the container removes the de-nitrated water from the container and returns it to the tank.
The flow rate should initially be 60-80 drops per minute.

Is that right?