Switch your fish to a new food gradually over one to two weeks by mixing it with the old food and slowly shifting the ratio. A sudden change can cause fish to refuse food or get digestive upset. Here's how to do it smoothly.
Why transition gradually?
Fish are creatures of habit and feed heavily by smell, so a brand-new food can be ignored at first. A gradual switch lets them get used to the new taste and texture and avoids the stress of a hard change.
The step-by-step method
- Days 1-3: about 75% old food, 25% new, mixed together.
- Days 4-7: roughly half and half.
- Days 8-12: about 25% old, 75% new.
- Day 13+: fully on the new food.
Go slower if your fish are hesitant, faster if they take to it immediately.
Tips for stubborn fish
Feed a little hungrier (skip a feed first), offer the new food fresh and aromatic, and match the right size and format for your fish. A short fast for healthy adults often resets the appetite. If a fish still refuses everything, check for other causes in why your fish aren't eating and picky eaters.
Keep portions in check
During the switch it's easy to overfeed by adding extra of both foods - keep the total to what's cleared in 2-3 minutes; see the how-much-to-feed guide.
Frequently asked questions
How do I switch my fish to a new food?
Mix new with old and shift the ratio over one to two weeks until they're fully on the new food.
Why won't my fish eat the new food?
It's unfamiliar - mix it with the old food, offer it fresh, and let them get a little hungry.
How long should a food transition take?
Usually one to two weeks; slower for hesitant fish.
Can I change food suddenly?
Best not to - a sudden switch risks refusal and digestive upset.
Should I fast my fish before switching?
A short fast for healthy adults can help them accept the new food; never fast fry or sick fish.
What if my fish still won't eat?
Check water quality, temperature and health - see our not-eating guide.
Does food size matter when switching?
Yes - match the pellet size and format to your fish for easy acceptance.
Can I overfeed during a transition?
Easily - keep the combined amount to what's cleared in a few minutes.
Switching foods? A fresh, aromatic staple like Life Aayu Neutral makes it easy - from Fish Bazaar, delivered across India.
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