Varies from water to water I would imagine and distances to be thrown (if it's thrown), many waters its sheer quantity, so brown crumb or vitalin if you can still source it, mashed bread, three or four loaves, maggot, casters, micro pellet, hemp, groats, or any mixture of said particles and worms(if small perch allow).... its all down to the head of tench in your venue, this year i'm trying a g.bait appriach on a particular club lake with very large tench, rather than loose feeding micros and groats, using a pole to cup the balls into position, purely to stop drawing small roach, rudd and perch in, balling cricket balls in to plummet to the bottom in the deep water, also I'm going to feed half boilies (not my favourite bait for tench) without particles hoping that I will target straight at the tench...