Well, latest inteligence shows (while testing the plumbing) that I should not become a plumber. I have one joint leaking in that line . . . so, I quess that I will increase it to a 1" line and maintain the 3/4" bulkhead, which if I understand what is being said, will not signifianctly decrease the flow, but only increase the velocity. So, I will now get my brother in law plumber over to do it correctly.
Thanks to everyone for the help and advice on this seemingly never ending challenge of getting water into the tank.