Brown breadcrumb is a superb and relatively cheap bulking agent for most types of groundbait. It doesn’t detract from the flavour and also makes the groundbait into a better consistency to work with. White breadcrumb tends to be more binding in nature, normally being used on its own when fishing with various types of bread hook baits. White crumb breaks down quicker if you mix it on the dry side, or dilute it with some brown crumb.