I've got chems down, its causing undue wear to the most expensive part of my unit, the pump, that is my big concern. Which after some more research it seems the longer run of the 1/4 " will cause more wear on the pump and motor than the 3/8" and if it means even just $50 less in annual maintenance then its worth it to me. Last year sucked with breakdowns I don't want to feel like all m profits are going into fixing equipment again. The dilution rate of chems i the metering system is also going to be way off with the 1/4" line.Oy vey! 1/4" has been the standard since 1776. worry more about chemistry and agitation...get those two pieces of the pie down-pat and go get that money.