NLS is way better than Hikari. Just check the ingredients. You'll be fine with what you're doing, though I'd only feed the frozen stuff as treats.
Hikari cichlid gold-
White fish meal, wheat flour, wheat-germ meal, brewers' dried yeast, soybean meal, shrimp meal, dehydrated alfalfa meal, carotene, thiamine mononitrate, riboflavin, pyridoxine hydrochloride, vitamin A supplement, l-ascorbyl-2-polyphosphate (source of vitamin C), vitamin B12 supplement, biotin, calcium pantothenate, choline chloride, D activated animal sterol (source of vitamin D3), folic acid, menadione sodium bisulfite (source of vitamin K activity), inositol, para-aminobenzoic acid, zinc oxide, manganous oxide, salt, ferrous chloride, copper sulfate, cobalt sulfate, aluminum sulfate, magnesium sulfate.
NLS grow formula-
Krill Meal, Fish Meal, Wheat Flour, Amino Acids, Algae Meal, Soybean Meal, Fish Oil, Beta Carotene, Spirulina, Vitamin A Acetate, D-Activated Animal- Sterol (D3), Vitamin B12 Supplement, Riboflavin Supplement, Niacin, Folic Acid, Calcium Pantothenate, Pyridoxine Hydrochloride, Thiamine, Biotin.