Previously called 'Tetenal Fixing Salt', Tetenal Vario Fix is a sodium thiosulphate based powder fix, using the anhydrous salt, & incorporating stabilisers. It's suitable for all black and white negative films and photographic papers.
The kit makes 5 litres of stock, which for normal use is used 1+1 with water. Times are 2-4 mins for film, 4-10 mins for paper. T-Max films will need double normal time.