You will only need a small amount to begin with
Its easier to put more in than taking it out.
Just keep trying until you find the level that works for you.As a rule of thumb I would only use one teaspoon to 1pt of maggots and go from there
Riddle off the maize, etc and add a couple of tablespoons of turmeric into your maggot box. I've considered adding chilli or curry powder but I'm worried that I accidently rub my eyes while fishing after handling them!!! I reckon that would put paid to a day out!
I also use turmeric and garam masalla' powder to coat my luncheon meat, before frying it in a little bit of oil. This is cheaper than buying the ready made stuf.