We suspect that the off taste might have come from some inconsistency of draining period after soaking process. The staff will take about 15-20 minutes to drain salt solution from the tank after finish soaking process. While the salt solution was draining the shrimp at the top of the tank will not be soaked but at the bottom still be soaking. We investigated that the salt solution may not be completely drained out for sometimes. This would lead the shrimp at the bottom of the tank would be strong salty taste.