Thank you for playing the role of sports fishing ambassador. I wish more people would take the time like yourself. It feels good and does a lot of good.
Purple over pink or visa versa, is the ticket. Have a chartreuse with pink or purple handy as a change up if it goes quite.
I'm lazy with fishing chum, using a bit of rubber tubing above a swivel so I can stick various lengths of lead in there depending on the weight of my terminal tackle. With a heavy 3/8 jig I can use a shorter piece then when I change to a 1/8 jig or small blade or even a single Jensen egg I can rapidly replace with a longer piece and keep the float at the optimum position.
PS, if you want to try a blade, brass appears to be the best option in a size 3-4.