This free aquarium fry food planner tells you what first food suits fry at each age, how many feeds a day they need, and how much to give per feed. It runs fully in your browser, so nothing you type is sent to a server, and you need no account and no sign-up to use it.
Aquarium problems usually build slowly. A tank that looks fine today can drift over weeks when feeding, stocking, or water changes stay unmeasured. Small numbers, checked early, stop most trouble before fish show stress. This tool turns a guess into a number you can act on, and that number is easier to trust than a rough rule of thumb from a shop assistant.
To use the tool, type in Number of fry, Fry age (days). Press the calculate button and the tool shows the result at once. If you change any number, press calculate again to see the new result right away. Try a few values to see how sensitive the result is to each input.
Example: 50 fry at 10 days old need microworms and baby brine shrimp, 4 feeds a day, and about 25 mg per feed, with 20 percent water changes twice a week.
Feed little and often. Fry have tiny stomachs, so five small feeds beat one big feed that fouls the water and leaves the weakest fry hungry.
Remove uneaten food after ten minutes. Rotting food in a fry tank raises ammonia fast, and fry are far more sensitive to ammonia than adult fish.
Grow infusoria before fry hatch. A jar of green water started a week early gives the smallest fry food from day one, when most shop foods are still too big.
Common question: Why can fry not eat crushed adult flakes at first? Because their mouths are too small and their guts cannot digest large particles yet. Food must match mouth size, or fry starve with a full tank.
Common question: How do I know fry are eating enough? Look for rounded bellies after feeding and steady growth week by week. Flat bellies and slow growth mean too little food or food that is too big.
Common question: When can fry join the main tank? Only when they are too big to fit in any other fish mouth, usually after 6 to 8 weeks. Moving them early turns them into expensive live food.
Keep a short notebook by the tank. Write the date, the numbers you entered, the result, and anything you changed afterwards. That short record turns a vague feeling that something changed into clear evidence. After a month you can look back and see which choices helped and which ones did not, and that makes the next decision much easier.
The most common mistake is changing too much at once. When several things change in the same week, you cannot tell which change caused the result you see. Change one thing, wait, watch the fish and the water, and only then change the next thing. Slow, single changes keep a tank stable, and stable tanks keep fish healthy.
Recheck the numbers whenever anything changes in the tank. New fish, a new filter, a different food, or a change in room temperature can all shift the right answer. A quick recheck takes less than a minute and stops an old number from quietly becoming wrong. Bookmark this page so the recheck is easy.
This tool is free to use as often as you like. Bookmark it, recheck the numbers when your tank changes, and keep the daily routine steady. Small, steady habits matter far more for an aquarium than any single perfect number, and a calm routine is what fish respond to best. If a number surprises you, run the tool twice with different inputs before you act on it, and trust the steadier result.