High Capacity Production Systems

This is our first season as a bait & tackle shop and this falls slack time
is new to me.

As well as all the glass aquariums, I have 2 High Capacity Production
Systems (bait tanks) in our store

1) 120 gallons. during the season it houses anywhere between 40,000 &
300,000 1" to 6" fish.
2) 80 gallons. 100 to 3,000 6" to 18" fish

Both systems have chillers, UV lights, large circulation pumps, air pumps,
and a bank of canister type bio filters that do very well at full loads.

VERY soon we will be cutting back on capacity until the lakes ice over and
ice fishing season begins. I was told that in order to keep the bio filters
working, I need to either keep fish in the tanks or seed the tank with
liquid ammonia.

I would like to keep the tanks alive with very few fish. Any idea how much
liquid ammonia I might need to do this? It doesn't have to be at full load,
but I am thinking I will need a steady but slow trickle down to a few drops
per minute to do this.

An idea's???

JOhn :-)