Aquarium frogs eat live insects, small fish, and prepared pellets designed for carnivorous amphibians

Most aquarium frogs are carnivores or omnivores, meaning they hunt and eat meat in the wild. In a tank, they will eat live prey like bloodworms, brine shrimp, and small insects. Some species also accept prepared sinking pellets made for frogs or bottom-feeders. The exact diet depends on the frog species you keep — African dwarf frogs have different needs than larger bullfrogs — and the size of your frog's mouth.

Feeding frequency matters as much as what you feed. Young frogs need food more often than adults, and overfeeding causes water quality problems and obesity. Most adult aquarium frogs do well on food two to four times per week, though some species are hungrier than others.

Key Takeaways

  • Live bloodworms and brine shrimp are the most reliable foods for small aquarium frogs and trigger natural hunting behavior.
  • Prepared pellets designed for frogs or carnivorous fish can supplement live food but should not be the only diet.
  • Feed adult frogs two to four times per week; young frogs and tadpoles need food daily or every other day.
  • Uneaten food fouls the water quickly, so remove any prey or pellets your frog does not eat within a few hours.
  • Vitamin supplements dusted on food once or twice per week prevent deficiencies, especially in captive-bred frogs.

Live Foods That Aquarium Frogs Prefer

Live prey triggers the hunting instinct in frogs and provides nutrition that prepared foods sometimes lack. Bloodworms are the most common choice for small frogs like African dwarf frogs and poison dart frogs. You can buy them frozen or live; frozen bloodworms thaw quickly and are easier to store, but live ones create more movement in the water and excite the frog to eat. Thaw frozen bloodworms in a small cup of tank water before dropping them in, so they do not shock the frog with temperature change.

Brine shrimp (also called sea monkeys) are another standard live food, especially for smaller frog species. You can hatch them at home from eggs in a few days using a straightforward kit, or buy them already hatched. They are small and move constantly, which appeals to frogs with smaller mouths. Larger frogs like bullfrogs will eat them but may find them too small to be satisfying.

Small insects like crickets and fruit flies work well for medium to large frogs. Crickets are sold at most pet stores and can be kept in a separate container until feeding time. Fruit flies are tiny and suit smaller species. Both can escape the tank if not eaten quickly, so count how many you drop in and remove any stragglers after 30 minutes.

Other live foods include daphnia (water fleas), mosquito larvae, and small earthworms. These are less common but valuable if your frog refuses other foods or if you want to vary the diet. Some specialty aquarium stores stock them, or you can culture them at home.

Prepared Foods and Pellets for Frogs

Not every frog keeper has time to maintain live food cultures or buy them regularly. Prepared sinking pellets designed for frogs or carnivorous bottom-feeders can work as a supplement or occasional main diet. Look for pellets labeled for frogs, newts, or carnivorous fish — these are formulated with the protein and fat frogs need.

Sinking pellets are important because frogs typically hunt on the bottom of the tank or in mid-water, not at the surface. Floating pellets often go uneaten and foul the water. Drop a small pinch of pellets near your frog and watch to see if it eats. Most frogs will snap at moving food more readily than stationary pellets, so live food will always be more appealing.

Prepared foods alone can lead to nutritional gaps over time, especially in captive-bred frogs that do not get the variety of wild prey. Use pellets as part of a rotating diet: live food three times per week, pellets once or twice per week. This approach keeps feeding straightforward while still providing nutrition.

How Often to Feed Your Aquarium Frog

Feeding frequency depends on the frog's age and species. Tadpoles and very young frogs need food daily or every other day because they grow quickly and have fast metabolisms. Feed them small amounts of specialized tadpole food, crushed pellets, or tiny live prey.

Adult frogs typically eat two to four times per week. African dwarf frogs and similar small species do well on two feedings per week; larger species like bullfrogs may want food three to four times per week. Watch your frog's body shape — a healthy frog has a rounded belly but not a bloated one. If your frog looks thin, feed more often. If it looks swollen or refuses food, skip a feeding and wait a few days.

Temperature affects appetite. Frogs in cooler water (below 70°F) eat less frequently than those in warmer tanks. Cold-water frog species may only need food once per week during winter months.

Removing Uneaten Food and Preventing Water Problems

Uneaten food decays quickly in an aquarium and creates ammonia spikes that harm frogs and fish. Live prey that dies in the tank becomes waste within hours. Pellets that sink to the bottom and are not eaten within a few hours will start to break down and cloud the water.

After each feeding, wait 15 to 30 minutes and remove any food your frog did not eat. Use a small net or siphon to pull out leftover pellets or dead insects. This habit prevents water quality crashes and makes it easier to tell if your frog is actually eating or just ignoring food.

If you feed live prey like crickets, count them before dropping them in. If you put in five crickets and only see three gone after 30 minutes, remove the remaining two. Loose crickets can hide in the tank and die, or they may nip at your frog's skin while it sleeps.

Vitamin Supplements for Captive Frogs

Frogs in the wild eat a wide variety of insects and small animals, each with different nutrient profiles. Captive frogs eating the same few foods repeatedly can develop vitamin deficiencies over months or years. The most common deficiency is vitamin A, which causes eye problems and weakened immune function.

Dust live food or pellets with a reptile vitamin powder once or twice per week. Sprinkle a tiny amount of powder on the food just before feeding — the powder clings to wet prey and the frog ingests it while eating. Do not overdo it; too much supplementation can cause toxicity. Follow the dosage on the bottle, which is usually one dusting per week for adults.

Calcium supplements are also useful, especially for female frogs that produce eggs. A calcium powder dusted on food once per week supports bone health and egg production. Many vitamin powders include both calcium and vitamin A, so check the label before buying separate products.

Species-Specific Feeding Notes

African dwarf frogs are small and eat tiny prey like bloodworms, brine shrimp, and small pellets. They are slow eaters and may miss food if it sinks too fast, so drop food near them and watch to make sure they find it. Feed two to three times per week.

Poison dart frogs are also small but more active hunters. They eat fruit flies, small crickets, and tiny bloodworms. Feed three to four times per week because they are more energetic than dwarf frogs. Poison dart frogs in captivity often refuse prepared pellets, so live food is essential.

American bullfrogs and other large species are aggressive eaters and will consume larger prey like small fish, larger crickets, and earthworms. They can eat once or twice per week because they consume more food per meal. Be careful not to overfeed — bullfrogs will eat until they are obese if given the chance.

Aquatic newts (sometimes kept alongside frogs) have similar diets but prefer food that sinks and moves slowly. They eat bloodworms, small fish, and pellets designed for newts. Feed two to three times per week.

Common Feeding Mistakes to Avoid

Overfeeding is the most common error. Frogs do not need large amounts of food, and excess food decays in the tank. Start with a small pinch of pellets or a few bloodworms per frog, and adjust based on how much is eaten. If your frog ignores food, it may be full or the water temperature may be too cold.

Feeding only one type of food creates nutritional imbalance. Rotate between live prey and pellets, and vary the type of live food when possible. A frog eating only crickets for months may develop deficiencies that a frog eating crickets, bloodworms, and brine shrimp would avoid.

Forgetting to remove uneaten food is the second most common mistake. Set a timer for 30 minutes after feeding and check the tank. This habit prevents water quality problems and keeps your frog healthy.

Using floating pellets or surface-feeding foods is a waste. Frogs hunt on the bottom or in mid-water, not at the surface. Floating food goes uneaten and fouls the tank. Always choose sinking pellets.

Frequently Asked Questions

Can I feed my aquarium frog regular fish food?

No. Fish pellets are formulated for fish, not frogs, and often lack the protein and fat frogs need. Some fish foods are also designed to float, which frogs cannot reach. Use pellets labeled for frogs, newts, or carnivorous fish instead.

How do I know if my frog is eating enough?

A healthy frog has a rounded belly and is active during feeding time. If your frog looks thin or refuses food for more than a week, the tank may be too cold, the food may be the wrong type, or the frog may be sick. Check the water temperature (most frogs do best at 72–78°F) and try a different food. If the frog still refuses to eat, consult a veterinarian who treats amphibians.

Can I feed my frog insects from outside?

Wild insects may carry parasites or pesticides that harm frogs. Stick to insects bred for pet food, which are raised in clean conditions. If you want to feed wild insects, only use ones from areas you know have not been treated with pesticides, and quarantine them for a few days first.

What should I do if my frog stops eating?

Check the water temperature first — frogs eat less when cold. Try offering a different food type; your frog may be bored with the current diet. If the frog refuses food for more than two weeks and the tank conditions are correct, it may be ill and needs a veterinary check.

Can I feed my frog frozen food instead of live?

Yes. Frozen bloodworms and brine shrimp are convenient and safe. Thaw them in tank water before feeding so the temperature does not shock your frog. Frozen food lacks the movement of live prey, so some frogs may ignore it at first. Try thawing it in a small cup and moving it around with a tweezers to trigger the hunting response.