Let's see now :
Trionic Concentrate (and trionic plus ) is good against many things including avian flu . But I wouldn't want to drink it , that's what the vaccines will be for . :-)
If you use Trionic Concentrate you can dilute it with water @ a ratio of 1/100 for normal soiling and a ratio of 1/50 for heavy soiling .
Click on Enviromental Hygiene
You can buy the Trionic Concentrate from Batten-Edwards for £28.32 for 5 litres
So one drum of Trionic Concentrate will give you 505 litres of mixed solution for normal soiling . That would make it 25 1/2 pence per Imperial Gallon of mixed solution !!! or 21.2932 pence per U.S. Gallon of mixed solution (@ a bank rate of $1.96 to the £ = 41.73 cents per U.S. Gallon ).
This is not including mop , rags , water , bucket , or labour . :-)
For those that don't know yet :
Imperial Gallon = 4.5461 litres
U.S. Gallon = 3.7854118 liters