I no my pots and I never water to run off....unless I am flushing, I try to dial in my water so that only a couple drop come out the bottom of my pots on feed days this is what works for me.
I don't have a run off either... I get onto that in a min.... feed more less volume even feeding at 1/2 gallon every other day was pushing on the dry side , I could do half gallon a day but that mite push to getting wet feet . lets get back to run off , its not a bad thing to do but not really needed ... if you wanna see how good you are , when your feed ppm and your run off ppm are +/- 200 ppm you are spot on and keeping slurries in range ...even a flush once in awhile is good even if its a 5% runoff ...