The tank should be boringly stable before you leave
An aquarium heading into a two-week holiday needs stability, not improvements. In the week before departure, do a partial water change, gravel-vacuum the areas where waste collects, and rinse filter media in the removed tank water so the bacterial colony survives the cleaning. Resist adding new fish, rearranging rockwork, or changing foods now — every novelty is a variable your feeder cannot troubleshoot from your written notes.
Test the water a few days before you go and again the day before, so you know the baseline your feeder is being asked to maintain. Run the heater, filter, lights, and any air pump through a full day of observation. Equipment that hiccups while you are home must be repaired or replaced before the trip, because a filter that stops on day nine of fourteen is the classic holiday disaster.
Portion the food so overfeeding is impossible
Overfeeding by a kind feeder is the most common way holiday tanks crash. A visiting feeder who cannot tell a pinch from a pile will guess generously, and uneaten food rotting for two weeks fouls water faster than hungry fish ever could. Remove the guesswork entirely: measure each day's ration into a small labelled container — one per day, dated — and hide the main food tubs out of sight.
Tell the feeder plainly that fish always look hungry and that the labelled portion is the whole job, even if the fish crowd the glass begging. If your fish normally eat twice daily, a single daily portion from the containers is safer for a holiday stretch than two visits' worth of enthusiasm. Note any foods that sink for bottom dwellers so shy species are not outcompeted while you are gone.
Write the visit down to a five-minute routine
A feeder visiting an aquarium should be finished in minutes. Your written routine needs the order of operations: check the filter is running and the temperature sits in its normal range, feed that day's container, top off evaporation with the jug of conditioned water you left beside the tank — never straight from the tap — and glance at each fish for anything obviously wrong.
Put the light timer on automatic so the feeder never has to remember switches, and label plugs and equipment with tape so a stranger can identify what is what. Leave the test kit with a one-line instruction for when to use it, plus a short list of what normal looks like in this tank: who hides, who grazes, how the water usually smells. End the page with your phone number, a nearby backup person, and the shop or vet you use, in that order.
Do a trial visit before the real holiday
A short rehearsal exposes every gap in your instructions while you can still fix them. Have the feeder complete one full visit with you present but silent, following only the written page. The questions they ask are the sentences your notes are missing.
When you return, change a portion of the water, resume normal feeding gradually, and thank the system that worked. With KinsLe's Care Pass, the whole handover — feeding portions, equipment quirks, emergency names — sits in one place your feeder can open on day one and no longer needs once you are home.