The fish are home, the tank is running, and every instinct says feed them well — they must be starving. Resist the feast. A fasted fish's gut has wound down, the tank's filter bacteria may have thinned during a quiet spell, and a big first meal becomes uneaten waste and an ammonia spike in water that has only just settled. Restarting feeding is a three-day ramp, not a celebration dinner.
Start smaller than feels generous
Offer the first feed at roughly half the normal amount — a quarter for fish that spent long hours bagged in transit, whose stress is higher and appetites duller. Scatter it widely so shy fish eat without competing, and give them a few minutes before judging. Anything still drifting uneaten after that window should be netted or siphoned out rather than left to rot "for later"; fasted fish do not come back for leftovers the way you hope, and the water pays for every scrap.
The ramp back to normal portions
Second feed, later that day or the next morning, can rise to about three-quarters of normal if the first vanished cleanly. By the third or fourth feed, most healthy community fish are back at full rations and behaving as if nothing happened — which is the outcome you are buying with patience. Fry and young fish ramp faster in frequency but not in portion: resume their several small feeds a day from the start, each one small, because their growth cannot pause the way an adult's appetite can. Frozen and live foods are excellent restart foods; they are eaten eagerly and completely, which is precisely what you want while you are still watching for leftovers.
Read the fish and the water, not the calendar
The ramp is guided by observation. Fish that surge to the surface and hunt every crumb are telling you they can take the next step up; fish that mouth food and spit it, or ignore it entirely, are telling you to hold the portion where it is. Test the water during these days if you can — a trace of ammonia after the first full feed means the filter is still catching up, and portions should stay small until it clears. After a journey, also expect a day of hiding; appetite returning on day two, in a fish that looks otherwise well, is normal.
When a slow restart needs a vet's eye
Most fasted fish are eating normally within a couple of days. Contact a vet if an individual still refuses all food beyond that while its tankmates feed, if fins stay clamped tight, if breathing is rapid at rest, or if you see stringy pale waste, swelling or spots appearing in the days after travel. Travel stress can let a quiet problem surface, and early advice is cheap compared with treating a tank-wide issue later. Describe the fast and the journey clearly — that history is the detail that helps the vet most.
Writing the ramp down keeps generous hands honest — your own included — so it helps to schedule it: KinsLe's Care Teams lets you set the restart feeds as care duties for the tank across those first days, each marked complete with a timestamp, so the half-portion discipline survives everyone's good intentions.