Bigger CC will inhibit the CNBG from eating while they vacuum up all the food. The CNBG will feed but not enough as they won't rush in with all the big CC eating.

I would feed the CNBG AM 500 & 600 and or GFC as 2000 and I think Grower 400 are catfish food (difference in contents - plant based protein rather than fish meal and animal products).