Feeding strategy
The feeder is the feed. Recast to refresh the trickle. On a river, every run-through or every few minutes in a crease. Don't also throw a pint by hand unless you mean to.
How to set it up
Running feeder or a simple link, blockend on a clip, hooklength to a maggot hook. Fill, cap, cast to the clip. On a river, find the crease first with a bomb if you need to.
Where to cast
Commercials: the same spot you'd method-feed, often slightly closer in the cold. Rivers: the crease, not the slacker inside unless that's where they're sitting.
Depth / presentation
Maggots on the hook, matching the feed. Dead maggots if small fish strip you. A worm tip for perch.
The first hour
Get a rhythm: fill, cast, wait, repeat. In the cold, wait longer. If the feeder comes back still full, the holes are too small or the maggots are clagged.
Conditions
Coloured or cold water. A bit of flow on a river. Bright high-pressure commercials may still want it — just a smaller feeder and a longer wait.