A simple comparison was performed to estimate the profitability of
using GW as a feed ingredient for tilapia culture in Vietnam (Table 5). The
cost of commercial feed and ingredients of different protein-enriched feeds
was based on the wholesale market price of Can Tho, Vietnam. The largest
(10.41%) cost reduction was observed in the 20% GW diet, followed by 30%,
40%, 50%, and 10% GW protein diets (Table 5).