Alright help me decide. I am installing a closed loop with two returns with penductors on them. I have a GenX Mak4 to run it. Does it matter if I go with the 3/4'' penductor, or the 1'' penductor. Will I lose too much pressure if I go with the 1'' size penductor, making them less effective generating less overall water velocity. I need to decide either way....So I can buy both the bulkheads and penductors...