I have had good results with soaked complete dog food mixed with bread and blended to make a mix .
I am not sure that it matters too much what pellets they are if you use pva and bait glugs as they are only to get the fish to notice your bait .
Maggots are better than any pellets in my opinion .
Also you can get very big sacks of hemp cheap and these are proberbly better or at least as good.