Whilst fishing on huge rivers like the River Ebro in Spain you need to use plenty of bait, ten kilos of boilies won't keep them in the swim for more than twenty four hours as it'll either be washed downstream or eaten. The cost of course is also to be taken into account as well dare i say it, the nutritional value? Far to often these days i see large quantities of bait going into waters with no appreciation of the fact that it'll sustain them for days. Is it no wonder so many places just switch off?
But Maize wont over fill them and its relatively cheap and carp absolutely love the stuff so it's got plenty going for it. Once it's passed through the carp all that's left is the husks, any that does get through will leave a scent trail for others to follow, nothing is wasted.