For a trip of a week or less, most healthy adult goldfish need no feeding at all. For longer trips, use a reliable automatic feeder or a pet sitter with pre-portioned food. The biggest mistake is dumping in extra food before you leave, which pollutes the tank.
Before you go
- Check the fish and water. Only leave healthy fish. Do a partial water change and test ammonia and nitrite a day or two before departure.
- Clean the filter lightly. Rinse media in used tank water, not tap water, so you do not kill beneficial bacteria.
- Put lights on a timer so the tank keeps a normal day and night cycle.
- Do not overfeed beforehand. Feed your usual amount.
Options for longer trips
- Do nothing (up to about a week). A healthy adult goldfish in a well-established tank can go this long without food. Our guide on feeding goldfish while on vacation explains how long they can safely fast.
- Automatic feeder. Programmable feeders drop a set portion on a schedule. Test it for a week at home first, and check that it does not jam or overfeed.
- Pet sitter. Put each day’s portion in a labeled bag or pill organizer so the sitter cannot overfeed. Leave written instructions.
- Feeding blocks. These dissolve slowly and can work for a short trip, but they can cloud water and are unreliable. Read our notes on feeding blocks and slow-release goldfish food before you rely on one.
What not to do
- Do not dump a big pile of food into the tank.
- Do not turn off the filter or heater to save power. Goldfish need oxygen.
- Do not ask someone who has never kept fish to feed “a bit extra.” Give exact portions.
When you return
Check that fish are active, test the water and do a partial water change. Resume normal feeding gradually. See also three holiday fish food tips.
Bottom Line
For a week away, healthy goldfish are fine without food. For longer, use an automatic feeder you have tested or a sitter with pre-measured portions, and keep the water clean before you leave.
