I also use a combination of Hikari Cichlid Gold & Hikari Cichlid Staple along with ZM Discus sinking bits to feed my Malawis, I have both Mbuna and Malawi Haps and they are doing good on this as a every day food.

New Life Spectrum I find puts a kind of greasy layer on the surface of the water, I did feed NLS but not no more.