so 18 * 38 L.
plan to have 2 skims, pair of drains,
then 3 returns and 3 deck jets...
is it better to run everything on it's own line....
Like:
returns on there own 1.5" each (3 runs),
deck jets on a 2" main feed then T into 1" for each (1 main run then 3 small runs)
drains tied together...