yes, 3/4 might be better than 1/2 (for the bong loop at least), maybe i'll upgrade later.
The purpose of the double tubing is explained above
i am running 2 loops, 1 for the computer, 1 for the bong.
I hope that by merging the computer loop with the bong loop, i get an increase in GPH @ the head, but that will have to be tested when i get my second pump and tubing/fittings.
I have been reading up on a lot of stuff, and have some more modifications planned for today.
