Temperature leads this log
White cloud mountain minnows come from cool, flowing streams in southern China, and they are at their best between about 57 and 72 degrees Fahrenheit — water most tropical keepers would call chilly. There is usually no heater to fail in their tank, which removes one risk and introduces another: the room itself becomes the thermostat. A tank beside a sunny window, above a radiator, or in a stuffy upstairs room can creep into the upper seventies on a warm afternoon, and white clouds held too warm fade, lose condition, and age fast. So the temperature line is the heart of this log. Read it whenever you pass the tank in summer, daily during hot spells, and write down the day's peak rather than a single morning number. A slow upward trend across a fortnight is your cue to move the tank, shade the window, or float a frozen bottle on the worst afternoons — long before the fish show you the problem.
The weekly chemistry that still matters
Cold water slows everything down, including waste breakdown and the fish's own metabolism, so the chemistry of a white cloud tank usually changes at a walking pace. Weekly checks of ammonia, nitrite, nitrate, and pH are plenty for an established setup. Ammonia and nitrite should read zero; if either appears, look first at feeding, since a cool-water school needs less food than its eager behavior suggests. Nitrate climbs gently and a modest water change settles it. pH is a stability watch rather than a target — white clouds accept a broad span, roughly 6.0 to 8.0, and a log that shows the same reading month after month is a healthy one. What the log really buys you with a fish this hardy is early sight of the unusual: the first nonzero ammonia in a year, or a pH that starts wandering, stands out immediately against a page of steady lines.
Logging through a heat wave
Hot weather deserves its own discipline. When a heat wave is forecast, note the tank's temperature morning and evening, and add what you did about it — lid open, light hours shortened, a fan across the surface, a partial change with cooler water. White clouds tolerate a few warm days far better than a warm month, and the log tells you which one you are actually in; memory is generous and will swear it was only a few days. Watch the fish as you write: a school holding lower in the tank and breathing fast is asking for cooler, better-oxygenated water, and your entry for that evening should say so beside the number. If the warm spell becomes the season, the record makes the case for relocating the tank to the coolest room before next summer rather than improvising again.
A record that suits an unheated tank
Because there is no heater, the equipment column for a white cloud setup is short — filter, light, and the thermometer itself — but write down when each changes, because a stronger light is often the hidden heat source nobody blames. Keep the seasonal shape of the record visible: winter lows, summer peaks, and any room move the tank ever makes. Over a year that becomes a genuine climate diary for one small tank, and it makes every future decision — a second tank, a patio pond, a new species — better informed. Storing it in a KinsLe Pet Passport keeps the white clouds' temperature history and tank details together in one packet, ready to hand over whenever someone else takes over their care.