I would reccommend New Life Spectrum pellets for the labridens. It contains quality and easily digestible protein such as Krill, Herring and Squid with Spirulina and algae meal. This food has been tested on vulnerable species prone to bloat such as tropheus, mbuna and victorian cichlids and has been proven to be very effective. I've tested this food on a herbivorous cichlid such as Haplochromis sp. Ruby Green and was easily digested and never showed a sign of bloat. Its color was amazing and was healthy.
The typical ingredients: Whole Antarctic Krill Meal, Whole Herring Meal, Wheat Flour, Whole Squid Meal, Algae Meal, Soybean Isolate, Beta Carotene, Spirulina, Garlic, Vegetable and Fruit Extract (Spinach, Broccoli, Red Pepper, Zucchini, Tomato, Pea, Red and Green Cabbage, Apple, Apricot, Mango, Kiwi, Papaya, Peach, Pear), Vitamin A Acetate, D-Activated Animal-Sterol (D3), Vitamin B12 Supplement, Thiamine, DL Alphatocophero ( E ), Riboflavin Supplement, Folic Acid, Niacin, Biotin, Calcium Pantothenate, Pyridoxine Hydrochloride, L-Ascorby-2-Polyphosphate (Stable C), Ethylenediamine dihydroiodide, Cobalt Sulfate, Copper Proteinate, Ferrous Sulfate, Manganese Sulfate, Choline Chloride.