Solitary travel for a fish that picks fights
The convict cichlid's toughness makes moving it simpler in one way and stricter in another. It tolerates the journey itself well, but it must travel alone. Bagged with a tankmate it could live beside for months, a convict in a confined, jostling container will often turn on the other fish, and even a breeding partner can be attacked when neither can retreat. One fish, one strong container, no exceptions, is the whole secret of convict transport.
Use a thick bag doubled for safety or, better for a fish with this one's strength and spiny fins, a rigid lidded container with plenty of its own tank water and a generous air space. Convicts can puncture thin plastic with fin spines when they thrash, so inspect the container after catching, and keep it dark to encourage the fish to sit rather than charge at shapes moving outside.
Catching without a war
Lower the tank water before catching if the move involves dismantling anyway, and guide the convict into a submerged container with a net rather than lifting it thrashing through the air. A fish this territorial fights the net hard, and every second of aerial struggle risks fin and scale damage that invites infection in the stress of a new setup.
Withhold food for a short while before the move so the transport water stays cleaner, and keep the container insulated in a box in the car's cabin. Convicts handle cool dips better than delicate species, but a steady temperature still shortens recovery, and a container rolling free in the boot is a container that may arrive cracked.
Release into a tank that already has a claim staked
Set up the destination before releasing the fish, with at least one cave or rock structure already in place. A convict released into a bare, bright tank panics and sulks; the same fish released beside a cave it can immediately own settles within the hour. Add its old cave if you can move it, since a familiar territory object carries more comfort for this species than any water additive.
Let temperature equalise with the container resting in the new tank, mix in new water gradually, then release the fish and dim the lights. Do not reintroduce tankmates the same day if they travelled separately; give the convict its first night to establish where it stands, then add companions with rearranged cover so no old boundary disputes resume by default.
The first days after the move
Expect boldness to return quickly and watch that it returns as display rather than damage: flaring at the glass is normal, relentless pursuit of a tankmate is a signal to add visual barriers or separate. Test the water daily at first, because a disturbed filter and a stressed, heavily feeding fish can push waste up faster than a fresh setup handles.
Feed lightly until the fish is patrolling confidently, and resist rearranging its cave area while it settles, however crooked it looks. For a convict, the territory is the home, and your tidiness is its earthquake.
Its tank values, territory layout, and companion notes deserve the same sturdy handling as its container, and KinsLe keeps them in its Pet Passport so the convict cichlid's history arrives at the new house complete.