juanito - Hypo clear agent isn't necessary?? but Doesn't it assure the fixer is completely cleared? or is there no hypo in the type of fixer I'm using?
Hypo Clearing Agent ("HCA") makes the washing process more efficient, and saves a lot of water.
Without HCA, you need to wash for quite a bit longer, but the end result (HCA plus shorter wash as compared to no HCA plus extended wash) is essentially the same.