Finally, a pellet small fish can actually eat. Nano fish, small danios, and juveniles struggle with standard pellets — they're simply too big, so half the food ends up as waste. NorthFin Nano Bits are a premium insect-based formula in a tiny 0.5mm slow-sinking pellet, sized precisely for nano fish and small-mouthed species, with no artificial dyes or fillers. NorthFin was founded by Darius Chodocinskas, an aquatic specialist with over 30 years' experience who grew frustrated with the fillers, hormones, and artificial pigments packed into ordinary fish food. Nano Bits put that whole-ingredient philosophy into a tiny pellet led by Black Soldier Fly Larvae with whole herring and sardine meal, steam-extruded and made in Canada to preserve nutrients. The bits are easily digestible and low-waste to keep small tanks clean — with no fillers, no hormones, and no artificial pigments or dyes. Feed a small pinch 1–2 times a day. Offer only what's eaten in a couple of minutes. Remove leftovers to keep a small tank clean. Right-size the meal for your smallest fish. Add to cart. Why NorthFin Nano Bits Natural insect diet — Black Soldier Fly Larvae mirror the insects small fish hunt in the wild, delivering digestible protein and healthy fats. Right-sized 0.5mm pellet — a tiny, slow-sinking bit sized for nano fish and small mouths, so far less food goes to waste. Natural color — astaxanthin and spirulina bring out vibrant color the natural way, with no artificial pigments. Cleaner water, low waste — steam-extruded and highly digestible, ideal for keeping small tanks clean — no fillers or hormones. Best For Nano fish, small danios, rasboras, small tetras, fry, and other small-mouthed species. The tiny 0.5mm slow-sinking pellet suits mid- and lower-water feeders. Offer only a small pinch eaten in a couple of minutes, once or twice a day. Key Ingredients Black Soldier Fly Larvae — a sustainable, insect-based protein rich in amino acids and healthy fats that fish digest easily, mimicking their natural top-water diet. High Omega-3 Herring Meal — top-grade fish meal with a higher concentration of DHA for healthy development, growth, and coloration. Whole Sardine Meal — a concentrated source of fully digestible protein plus omega-3 fatty acids (EPA and DHA) and key vitamins and minerals. Certified Organic Kelp — marine seaweed supplying roughly 60 minerals, 21 amino acids, and 12 vitamins to improve overall health and activity. Spirulina — natural blue-green algae rich in protein, vitamins, and minerals that supports immune function, with natural pigments for color enhancement. Calcium Montmorillonite Clay — provides 67 minerals and essential trace elements to help correct dietary deficiencies. Feeding Feed 1–2 times daily, offering only as much as your fish will consume within a few minutes. Remove any uneaten food to keep water quality high. Rotate Nano Bits with other NorthFin formulas to add variety to the diet. Ingredients Black Soldier Fly Larvae Meal, High DHA Omega-3 Whole Herring Meal, Whole Sardine Meal, Wheat Flour, Organic Kelp (Laminariales), Spirulina, Garlic (Allium Sativum), Astaxanthin, Montmorillonite Clay, Vitamin A Acetate, L-Ascorbyl-2-Polyphosphate, Cholecalciferol, Alpha-tocopherol Acetate, Vitamin B12 Supplement, Riboflavin Supplement, Niacin, Pantothenic Acid, Thiamine, Calcium Pantothenate, Pyridoxine Hydrochloride, Folic Acid, Biotin, Choline Chloride, Cobalt Sulfate, Ferrous Sulfate, Manganese Sulfate, Selenium, Zinc, Rosemary Extract (Rosmarinus Officinalis). Guaranteed Analysis Crude Protein (Min): 50%Crude Fat (Min): 6%Crude Fiber (Max): 5%Moisture (Max): 9%Ash (Max): 10% FAQ How much should I feed? Offer only a small pinch eaten in a couple of minutes, once or twice a day, and remove any leftovers to keep a small tank clean. Will it cloud my water? No — the bits are steam-extruded and highly digestible, so they are eaten efficiently and produce low waste, which matters most in small nano tanks. Why insect-based? Because insects make up a large share of what small fish eat in the wild — Black Soldier Fly Larvae mirror that natural diet in a form nano fish and fry can easily take.
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