Just want to share a thought with you. One of the reasons I am a big fan of Ilford is the documentation that they provide about their chemicals. The Ilford Rapid Fix will do 24 rolls of 35mm/36exp---80 sheets of 8X10 RC---40 sheets of 8X10 Fiber all per litre. These are good numbers--I normally limit it to 20 rolls of film/litre. Now I am not a wacko environmentalist but I do believe in using my chems to the max amount reasonably possible. 1-shot fixer seams to be a waste of fixer and pouring more junk down the drain than necessary. Just a thought.
Also I have never heard of "silver particles sticking to the negative" but hey they could fill a book with what I don't know!!!!