Holiday Care for Fish: Going Away Without Worry

Healthy fish in a well-kept, established tank can usually manage a short break, and overfeeding by a well-meaning helper is a bigger danger than hunger. Do a normal water change about a week before you leave, put the light on a timer, and for longer trips use a tested automatic feeder or a fish sitter with pre-portioned food. Test the water when you get home.

How Long Can Fish Go Without Food?

It depends on the fish. Practical Fishkeeping magazine suggests that a healthy community tank can generally go about five days without food. Large fish that eat infrequently may manage longer, while tiny fish and young fish need feeding more often. Algae-grazing catfish may find food on the glass and decor. Ask your aquatics store about your species if you are unsure.

Don't feed extra before you leave: uneaten food just fouls the water while nobody is there to deal with it.

Before You Go

Do a normal-sized water change about a week before you leave, not the day before, so any problem shows up while you are still home.
Don't clean the filter or change media right before you go.
Don't add new fish in the weeks before a trip.
Check filter sponges and pads still have plenty of life.
Put the light on a plug-in timer so plants get their usual day and algae doesn't take over.
Test the water and check the heater and filter are working.

Feeding Options

Ways to feed fish while you are away
Option	Good for	Watch out for
No feeding	Short breaks for healthy adult fish	Young fish and tiny species
Holiday food blocks or gels	Around a week	Dissolve at different speeds; test weeks ahead
Automatic feeder	Longer trips	Food clumping in damp air; test well ahead with pellets or granules
Fish sitter	Any trip, especially long ones	Overfeeding; brief them carefully

Holiday Kit

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An automatic feeder and a light timer cover most trips. A pill organizer makes pre-portioned food easy for a sitter, and a battery air pump keeps water moving during a power cut.

Briefing a Fish Sitter

Show, don't tell: do a feed together before you go.
Pre-portion the food into a labeled pill organizer or small bags, one per visit, and hide the rest of the tub.
Visits every couple of days are often enough for adult fish; agree a plan with your store's advice.
No catching up: if they miss a visit, they shouldn't double the food next time.
Leave contacts: your number, your aquatics store and what to do if the filter or heater stops or the power goes off.

Fish medicines and treatments: see your vet or a pet supply store with trained staff. If fish look unwell while you're away, your sitter should call you or your aquatics store rather than add anything to the tank.

For other pets, see boarding, sitters and holidays.

When You Get Home

Count your fish and remove any leftover holiday food.
Test ammonia and nitrite first, as overfeeding raises both, then pH.
Do a partial water change and rinse filter sponges in the old tank water.
Go back to normal feeding gradually.

Frequently Asked Questions

What fishkeepers ask before a trip.

Can I leave my fish for a weekend?

Healthy adult fish in an established tank usually manage a weekend without food. Young fish and tiny species may need feeding, so ask your store.

Are holiday food blocks safe?

They can work for about a week, but they dissolve at different speeds in different water. Test one in your tank weeks before you go.

Should I feed my fish more before I go away?

No. Extra food fouls the water while nobody is there to fix problems.

What about my pond fish?

Pond fish in a well-planted, established pond often find natural food, especially in warm weather. Ask your store about your pond, and make sure someone checks the pump and filter.