Right now I am doing 10 gallon batches that I split into 2 6.5 gallon carboys. The first time I used vinyl tubing with a splitter like the picture below, it worked fine. I was also using leaf hops, so my false bottom in my boil kettle didn't clog up that much. When I did my stout lately with pellets, It took forever to drain. I don't want this to happen again in the future, so I was wondering if anyone had any ideas how to split the batch while trying to get even distribution of the wort between the two carboys.