[willy]

Blue I used to use chum pots, you know the metal ones that are cylindrical in shape with a end that opens up.
Not any more I now use onion bags that they get in the grocery stores, no more trying to get all the stuff out of the metal mesh, now we just throw it out at the end of the day. Sweet.
We vary what we use based on what is on hand but generally I have a big plastic bucket and I take mussels and a can of Mackerel from the grocery store, about a dollar and crush it all together, sometimes we also put cat food (cheap) in. Smash it all up together add one store bought clam and fish frozen log to the bunch and drop it down until it hits bottom, lift up a foot or so, so that it bobs up and down with the boat action, make another bag up and drop it in also. we double anchor (bow and stern) so we are sideways to the current and drop are lines in just out from the boat.
We have tried other things including small jigs etc but never as productive. At least when the fish are there.
The slick of oil and bits and pieces that come off the chum bags is pretty amazing and we have to redo them about every half hour depending on current.
Most flounder this time of year are up in shallow flats (dark mud preferred)
during the day to warm up and feed on all the invertrabates in the mud.