WRT salt ... and Whitty may correct me on this ... I believe that Van Den Eynde “special” had a very high salt content and therefore caused bloodworm to be very active. This may be an urban myth but leads on to my other points:
I like to consider 4 properties for groundbait:
1. Ability to carry loose samples (ie stickier/heavier mix) collant, PV1, dry leam and terre de rivière (types of clay)
2. action .. ie. Does it break up quickly and create a cloud of particles or lay inert on the bottom? Mixing the night before is a way to achieve a more inert mix. Obviously, how you mix with water can affect this.
3. chemical attraction ... is there something that is triggering a feeding impulse (eg. Fish meal vs sweet).
4. Colour ... agree with Alan that darker colours generally work better in clear water, but what about punch crumb or liquidised bread?
I’m much more worried about the first two points, iirc It was an Ian Heaps article about England practise on the Moselle where the difference in action of the ground bait made the difference between catching roach and bream.
so my groundbait menu is pretty short
- white crumb and liquidised for bread fishing
- brown crumb as a bulking agent
- PV1 and TDR as binding agents
- Sensas Gros Gordons (large roach) for chemical attraction
- sensas black river (binding and colour)
- sensas black lake (cloud active and colour)
- fishmeal (chemical attraction for bream)
and just to show that conventional wisdom isn’t all that .... for a short underwater video With a former team mate of Alan and myself ... google YouTube rob hewison and have a look at “bagging on bread”. (Sorry - unable to post links at the mo)
also worth saying that I’m not an expert on ground bait ... much more of a loosefeed person. But keeping it simple works for me.
Two other tips
electric drill and ground bait whisk for large quantities
riddle for smaller quantities
or just stir Vigorously with your fingers