Name the guppy properly at the top of the note
A guppy vet note starts by identifying a fish most records leave anonymous. Describe the presented guppy by sex, tail colour and shape, and any marking that separates it from tankmates, then write the concern and when it began. Follow with the vet's findings on tail edges and fullness, body condition, gill movement, and skin. Add whether the fish was eating and competing normally at home before capture. In a group of similar fish, that identification block is the only thing that lets you, next week, be sure the fish you are watching recover is the fish the vet actually examined.
Record the vet's call: one fish or the whole tank
The most important line in a guppy record is whether the vet framed this as an individual case or a tank case. Write that judgement down with the reasoning given: a torn tail from a tankmate is one story, while tail loss appearing on a second fish is another. Record any instruction to watch, separate, or treat tankmates, and the exact spread sign the vet named, such as another fish clamping its fins or a female going off food. Note what was said about fry present in the tank, since advice for adults and advice where fry are swimming are often different, and that distinction disappears if you only remember the headline.
Breeding and population context the vet used
Population context belongs in a guppy vet note because crowding and breeding load shape almost every guppy problem. Record the numbers you gave the vet: adults, juveniles, fry, and the sex balance, plus when the last new fish arrived and where from. Note any comment about separating sexes, resting a repeatedly breeding female, or reducing numbers, exactly as given. If the vet asked about the parents of a young fish with a bent spine or poor growth, write the answer you gave beside the question. Those breeding lines read as trivia on the day and become the explanation three generations later, when a pattern repeats and nobody remembers the first case.
Follow the group daily, not just the patient
Home follow-up after a guppy visit is a group log with the patient highlighted. Each day, note whether the presented fish fed and swam with the group, and scan for the spread sign in tankmates, recording a simple yes or no rather than a hopeful impression. Count the group, including fry, at the same time each day while the follow-up lasts, since a quiet loss during a disease watch changes the picture. Record water changes and test results on the days the vet requested them. If the spread sign appears, that dated group log is the evidence you give the vet, and it shows speed of spread, which a single worried observation cannot.
File guppy notes inside the tank's running history
Guppy visit notes should be filed within the tank's running history rather than as a lone fish file, indexed by the fish's description, the concern, and whether the case was judged individual or tank-wide. Keep breeding outcomes and losses recorded against the visits they relate to, and keep every visit note while the line continues, because recurring tail and condition problems in guppies are usually a story told across episodes. Photos of the presented fish against the group help future identification. Filed in that running context, KinsLe can keep each guppy visit connected to its tank and breeding record in the Pet Passport.