Ryuji Suzuki has a lot to say about fixers on http://silvergrain.org/Photo-Tech/index.html, with a very interesting recipe. I'll try that next time, it might be less odorous than the one I use now. And maybe I'll try a similar modification again - make a version with Sodium Thiosulfate and Ammonium Chloride.

I need to buy some more pH strips soon - down to my last 10 now!