If any aquarium fish was designed to forgive a holiday, it is the white cloud mountain minnow. This small, bright-finned schooling fish comes from cool mountain streams and keeps happily in unheated indoor water that would chill most tropical species. That single fact simplifies your arrangements enormously. There is no heater to fail, no narrow warm range to defend, and a healthy school in a mature tank tolerates a short trip with only a couple of check-in feeds. Your holiday plan should therefore be short, and its most important line is a warning: nobody is to warm these fish up out of misplaced kindness.
Leave the water cool and the heater absent
Write, in so many words, that the tank is unheated on purpose and the minnows prefer it that way. A checker unfamiliar with the species may see a thermometer reading that would alarm a tropical keeper and reach for a heater or move the tank near a radiator, which stresses white clouds far more than the cool water ever would. The same applies in summer: if a heatwave coincides with your trip, the instruction is a fan across the surface or a cooler room, arranged in advance, not ice cubes tipped into the tank. Steady and cool, with gentle flow from the filter, is the whole climate plan for this species.
Feed lightly from portions you measured
White clouds are eager, surface-and-midwater feeders that will convince any visitor they are starving within seconds of a face appearing at the glass. Portion their usual small flake or micro food into envelopes by visit day, and space visits a few days apart on a short trip rather than daily, because this hardy school genuinely does not need daily feeding while you are away and every extra meal is extra waste in an unattended tank. One envelope per visit, watched until it is eaten, which takes this quick school only a minute or two, keeps the water clean for your return and the fish in normal condition.
Ask for a filter check and a headcount
The one piece of equipment that matters is the filter, since even white clouds need its flow and oxygen. Ask your checker to confirm it is running and the surface is moving, and to count the school loosely: all fish up in the water, fins bright, schooling loosely as they do. A fish sitting alone at the bottom, a silent filter, or cloudy water are the three findings worth a message and a photo. Leave a jug of conditioned water for a top-up to your marked line and a note that no water change is needed on a short trip, because disturbing a settled, cool tank helps this species not at all.
Enjoy the simplest handover in fishkeeping
Your note for white clouds can fit on one card: cool tank on purpose, no heater, one envelope per visit, filter running, count the school. That brevity is a genuine feature of this species and a good reason it suits new fishkeepers so well. Even so, write the card rather than saying it, because the one error this fish attracts, warming, comes from a visitor acting on a spoken half-memory. Sending that card through KinsLe's Care Pass gives your checker temporary access to the minnows' simple routine, with the keep-it-cool warning impossible to miss, and your school will greet you at the glass, bright-finned and unbothered, when you walk back in.