A lot of people aren't sure what to use instead of fish sauce – it’s not necessary to replace it with anything as long as you have enough soy sauce. u003cbr/u003eu003cbr/u003eAfter all, Thai food is all about balancing four key elements: salt, sweet, sour and spice.u003cbr/u003eu003cbr/u003eWe think a balance of light and dark soy sauce gives enough saltiness without adding anything else, but you could try u003cstrongu003evegan fish sauceu003c/strongu003e if you have it to hand