Nigel, i think you've read my post wrong, I prebait with 10 kilos, not 30kilos!on the rivers i fish I've found this is the amount needed daily to get the fish to visit the spots DAYTIME.I never fish stillwaters for carp, I only river fish- carp in the summer and pike in the winter. By fishing similar areas throughout the season but for different species helps build the bigger picture.As for expense I reckon on my 10kilos being cheapish for guaranteed daytime succes. I get one day a week to fish and I want to catch.The mix is about 6kg Vitalin,cost about ?3, 2kgs pellets cost about ?1.20 and then the small amounts of the rest equals maybe ?1. Total cost say ?5.20, Total baiting cost ?20.80 per week, season ticket ?50, so about ?1.30 per trip. So I spend ?22.10 per trip for GUARANTEED SUCCESS.The 2 rivers I fish are hardly fished at all apart from some hardy sea trout fishermen, and on the tidal stretches not at all, so I'm not impinging on anyones fishing.On the odd occasion I've seen a pleasure fisherman nearby I will not bait up, just out of courtesy.Out of the 10kilos that I'm putting in, this will be hammered by roach,rudd,bream,chub,tench,mullet(!) and eels so i make sure there are larger food items that can escape the attentions of the shoal fish.All I'm saying is it works for me and 3 summers ago I fished the same stretches up to 3 times a week without prebaiting and caught hardly anything at all.