Start with every account holding your old address
A threadfin rainbowfish group leaves a paperwork trail at your fish shop, with any aquatic vet, on food and supply delivery accounts, and on the instruction sheet kept with the tank. Update all of them with the new address and a current phone number in the first days after the move. Threadfins are delicate, display-oriented fish whose care depends on small, frequent, correct inputs — the right fine foods, stable water, a helper who knows the routine — so the cost of a stale address or an out-of-date instruction sheet is higher for this species than for a hardy one.
File the new tap water readings for a swing-sensitive fish
Threadfin rainbowfish come from slow, heavily vegetated creeks and are notably sensitive to sudden changes in water chemistry and temperature; swings that a danio shrugs off can leave threadfins clamped, pale and refusing food. Test the new home's tap water for pH and hardness and record the results against the old supply's numbers in the group's notes. If the new water is meaningfully harder or more alkaline, that written fact guides how gradually you blend the new supply into water changes, and it gives a vet or shop a concrete starting point if the males stop displaying in the weeks after the move.
Record the sex ratio and fin condition during the move
A threadfin group is usually kept with more females than males, and the males carry long, trailing extensions on their dorsal and anal fins that tear easily during netting and transport. While the tank is drained, count the group, note the sex ratio, and record each male's fin condition honestly — intact, frayed, or torn in the move. That dated-by-the-move record is what lets you judge recovery later: a frayed edge that is regrowing looks very different from one that is worsening, and a written starting point replaces guesswork about whether the damage happened before, during or after the move.
Rewrite the sitter sheet around small mouths and calm handling
Your new helper sheet needs the new address, the new nearby emergency contact, and instructions specific to threadfins: their mouths are tiny and upturned, so food must be fine enough to take at the surface, and the group startles easily, so the tank should be approached slowly with lights already on. Note where food, the test kit and the spare heater are stored in the new house, and which sockets run the filter, because a nano or species tank relocated to a new room rarely ends up wired the way it was before.
Refresh shop, vet and service details for the new area
Give your fish shop the new address and confirm frozen and live food deliveries follow the fish, not the old house. If the move takes you to a new shop, note in your own records where the threadfin group originally came from and how long you have kept it — provenance and time in your care are the opening questions in any serious health conversation about rainbowfish. A maintenance service, if you use one, needs the new address plus access details for the property.
Once the sex ratio, fin notes, water comparison and new contacts are written down, KinsLe's Pet Passport holds a threadfin group's records in a single packet, so a vet or sitter receives the whole picture rather than fragments.