Just a couple things. The darkroom I use at school has a chemical I don't hear mentioned much, "Hypo Clearing Agent". After fixing I rinse for a couple minutes, then HCA about 1-2, then a 5 minute water rinse followed by photoflo. Is the HCA necessary? Also, one step I was taught was to start off with a water rinse (fill with same temp water, agitate for a minute) before putting the developer in. Does anyone else do this? I just wonder because these steps were taught for use with Kodak films. When I start going in with some fuji and ilford, as well as some expired Kodak Tmax I will be shooting, are such steps are necessary? I don't see them listed on the manufacturer's website, or many other developing sites for that matter.