No true, Farmers reducer is a two part reducer mixed just before use.

Rarmers Reducer

Part A
Sodium Thiosulphate 40g
water to 1 litre

Part B
Potassium Ferricyanide 19g
Water to 250ml

To use 1 part B + 4 parts A

Make up to 32 parts with water

ie 10ml B + 40ml A + 270ml Water = 320ml working solution.
It has a very short life


A very lazy way is to use a rehalogenating bleach used for toning with some fixer, however this is faster working and not as controllable and you shouldn't use a Rapid fixer.

Ian