Regarding emergency systems (including both alarm and emergency equipment), two-thirds of the consultants agree that poor backup systems still remain in many production companies (the
main reason being the desire to have a low initial investment). In terms of emergency equipment, nearly 40% of on-growing producers have just one biofilter and 50% just one solid removal device; this illustrates that little is invested on them. Moreover, in order to decrease the investment, consultants agree that fewer tanks than are really needed (e.g. for the daily procedures such as grading, harvesting and cleaning) and smaller pipe diameters are installed
frequently; these compromise daily tasks and increase the probability of failure. Regarding alarms and asking consultants about them, 15 out of 18 agreed that poor alarm networks are in place (in relation to poor or non-maintenance of the installed systems and to a lack of a proper alarm system). Overall, the survey results show that hatcheries have better backup set-ups than on-growing systems due, probably, to the higher added value of the cultured products.