The color of the samples from tanks No.
3 and No. 4 was light (high L* values) compared
with that of the other products. The pH values of
the silver carp fish sauces No. 1, No. 2, the Thailand
product, and the soy sauce were in the range of 4.5–
4.9, which is preferable for preservation. However,
the pH of the products No. 3, No. 4 and Fujian were
high, which might be less favorable for preservation