I am absolutely new to film development. A professional photographer was nice enough to take the time to write me an e-mail in response to a question about choice of developers. In part as a consequence of his advice, I decided on D-76 with the Tri-X film I have been shooting. I bought the D-76, or rather a D-76 clone, so I don't want to revisit the choice of developer.
My question relates to technique. He told me that D-76 is not a highly active developer and when it is diluted 1+1, it is advisable to process only one roll at a time in a two roll tank. Otherwise the film will not develop fully. It doesn't sound right to me, but it could also simply be a precaution he typically gives to beginners, in which case it might not be a bad idea. I don't know.
Any thoughts? If I did follow this advice where would I station the reel--at the top of the tank, in the middle?