Write it for someone who has never met him
The test of a care plan is a reader who knows nothing: a son home from university, a neighbour covering a holiday, a grandchild who has only ever waved at the glass. Write in plain steps, in the order they happen, and include the unglamorous details you would never think to say aloud — where his food is kept, which jug is the tank jug, that the light switch for his tank is the left one. Photograph his feeding corner and his usual resting place and attach the pictures to the plan; a stand-in who can match the tank to a photo starts confident instead of guessing.
Feeding: the part that goes wrong first
Describe his food the way it is actually served, not the way the tub describes it. If his pellets are soaked and delivered by baster to his corner, say so, say for how long they soak, and say roughly how many. Describe what success looks like — he comes to the corner, takes most of what is offered, drifts back to rest — so the feeder can tell a normal meal from a worrying one. Name the traps too: do not feed extra because he begged at the glass an hour later, and never feed the tank's floating food 'to top him up', because his whole routine exists precisely because he cannot compete for that food.
Write down what 'normal for him' looks like
A stand-in cannot spot a change in a fish whose normal they never knew, so give them his baseline. Where he rests and for how much of the day, how he greets feeding time, how he cruises the tank in the evening, the faded patch on his side that has been there for a year and means nothing. Keep it short and observational — behaviour and appearance, not interpretation. With that paragraph in hand, 'he didn't come to his corner this morning' becomes a report you can act on, instead of a worry someone talked themselves out of mentioning.
The red-flag list and who to call
End the plan with a short, unambiguous list: the changes that mean phoning you the same day, and the smaller set that mean phoning the vet directly. For a senior fish that usually means refusing food for more than a couple of feeds, new marks or swelling on the body, gasping or hanging at the surface, or a sudden change in how he swims. Put both phone numbers on the page itself rather than assuming they are in the reader's phone. A short list that gets used beats a thorough one that leaves a worried stand-in unsure whether their concern qualifies.
From paper page to shared routine
Paper by the tank is a good start, but it fades, gets splashed and cannot tell you whether today's feed actually happened. KinsLe's Care Teams holds the same plan as assigned duties on his profile — feeding, water checks and observation notes, each marked complete with a timestamp — so any family member can pick up the routine where the last person left it, and you can see his senior care happening even when you are not the one doing it.