🧳Transporting a Guppy: bagging, acclimatisation, moving

Guppy : Transport in bags in small groups, protected from the cold. Acclimate slowly, especially if the source water is harder than yours, mixing the waters over 30 minutes.

In short: 3 to 6 cm as an adult depending on sex, 60 L minimum for a group, water between 22 and 26 °C. Peaceful and sociable, yet males court relentlessly: keep two to three females per male to spread the pressure. An ultra-prolific livebearer in hard alkaline water: plan for overpopulation and avoid the very soft acidic water that weakens it.

Bringing home or moving a Guppy

The bagging rule: double thickness, one-third tank water to two-thirds air, kept dark in a cool box that protects from swings away from its 22 to 26°C comfort zone. Split the group of 6+ across several bags: less ammonia per bag, fewer losses if one fails.

Acclimatisation: the critical step

Start with 20 minutes of floating, bringing the bag water to tank temperature, then add tank water in small doses over 30 to 45 minutes, and release with a net without pouring bag water into the tank. In this species, a botched transfer is paid for in bouts of white spot disease in stressed fish. Lights off for the first day: a newcomer hazed under floodlights starts with a handicap.

Moving an entire aquarium

To move a Guppy tank: occupants in covered buckets, filter media kept damp in a cool box — those bacteria are the tank’s real treasure — plants bagged wet, and a same-evening restart with as much original water as possible. The tank itself travels EMPTY: glass stressed by a few leftover litres cracks at the first corner.

Frequently asked questions

How long can a Guppy handle transport?

A few hours easily in a proper bag, up to 24 hours in an oxygenated professional bag. Past two hours, protect the temperature above all.

How do you acclimatise a Guppy safely?

Float the bag 20 minutes, add tank water gradually over 30 to 60 minutes, release with a net, lights off the first day — and never pour bag water into the tank.

The guides that apply to you

• Why transport stresses fish: what cortisol reveals

  Handling, a sealed bag, temperature swings: transport triggers a measurable hormonal cascade in fish. Understanding this mechanism explains why some transport precautions matter more than others.

• Moving House With an Aquarium: How to Transport the Filter and Heater Without Crashing the Cycle

  Draining the filter or letting it dry out during the trip kills off much of its nitrifying bacteria. How to keep the filter media wet and alive while moving house.

• Heatwave and aquariums: how to cool the water without thermal shock

  During a heatwave, aquarium water can top 30°C: a fan, pausing lighting and a bottle of ice cool the tank without a sudden, harmful thermal shock.

• A Pinch of Salt in the Transport Water: Why It Reduces Fish Stress

  Adding non-iodized salt to the transport bag or bucket limits stress-related electrolyte loss, according to a study on farmed fish transport.