[paul_c5x4]

HEICO PERMA WASH
Ammonium sulfite, monohydrate CAS# 10196-04-0 < 20%
Sodium 2-ethylhexyl sulfate CAS# 126-92-1 < 5%

A trade formulation of hypo-clear - Not really needed for film although it is useful when processing fibre based papers.

PhotoFlo, Ilfotol, or similar wetting agents are useful in the final wash to help eliminate drying marks - I'll mix a litre at a time and reuse over the course of a week or so before disposal.

Fixer - Mix according to instructions on the bottle, keep count of how many films have been through and dispose of once:
a) Manufacturer's recommended limit has been reached.
b) Snip test indicates fix times have doubled.
c) Silver test indicates limit reached.
d) After the shelf life of a mixed solution has been reached - Usually around three months.

Check with local authorities before tipping spent fixer down the drain and/or consider silver recovery before disposal.

I have a 500ml bottle mixed at 1+9 for films, and a second batch of 2 litres (again 1+9 mix) for paper.