Farm A was treated by continual addition of SPC under normal flow. This method provided a spatially consistent but highly temporally variable dose and wasbelow the target dose in all sections and at most times due to dilution of the product and poor matching of product addition with flowrate.reported under-dosing in incubators usingliquid HP, caused by dilution of the product as is moved throughthe system. Rach and Ramsay (2000) also noted that dilution andvariable flow patterns caused under-dosing when applying liquidHP to incoming water in connected flow-through raceways