Clean around the territories, not through them
A bumblebee goby tank is a map of small defended addresses — a shell here, a rock cave there, a hollow under driftwood — and routine cleaning has to respect that map. The weekly session is short: a modest partial water change, a careful siphon of the open sand, a rinse of the filter sponge when flow fades, and a deliberate headcount. What it must never become is a full strip-down. Every cave moved is a territory destroyed, and a goby that loses its home spends days exposed and stressed while it renegotiates boundaries with its neighbours. Clean the tank the gobies live in, not an emptied stage set.
Match the water before it goes in
Many bumblebee gobies are kept in light brackish water, others in hard fresh water, but whichever regime a tank runs, replacement water has to match it before the change begins. Mix and check the salinity of the new water in the bucket, match its temperature, and only then swap a modest share of the tank's volume. Gobies are small fish with little reserve against sudden chemistry swings, so the cleaning virtue here is sameness: same salinity, same temperature, similar timing each week. Keep the mixing gear — hydrometer or refractometer, salt container, notebook of readings — together, so the person cleaning is not improvising the recipe from memory.
Siphoning a bottom-dweller's floor
Work the siphon slowly over open sand, hovering rather than digging, and watch the tube constantly: a bumblebee goby is small enough, curious enough, and bottom-bound enough to be drawn toward disturbed debris. Lift waste from feeding areas and the front glass line, skim the surface film that gathers in still corners, and leave a light dusting of detritus deep inside caves alone rather than evicting the occupant to reach it. Feed with the same floor-plan in mind — sinking foods delivered near each territory, leftovers removed the same day — because food rotting inside a defended cave is both a water problem and a reason the goby stops defending it.
Filters, glass, and the quiet corners
A gentle sponge or small internal filter suits gobies better than a powerful unit, and it should be squeezed clean in removed tank water during the weekly session, never replaced wholesale, since its bacteria carry the tank. Wipe the front glass for the headcount view, but soft algae on rocks and cave roofs can stay; gobies graze biofilm as part of their day. Check that cave entrances have not silted shut, that shell openings face usable directions, and that the sand has not compacted into hard, dark patches — a chopstick swirl through suspect areas during cleaning releases trapped gas and tells you by smell whether a deeper intervention is overdue.
When cleaning uncovers a problem
A goby missing from its usual cave across two cleans, blackened sand that smells of rotten eggs when disturbed, or several fish sitting out in the open breathing hard all call for more than the routine. Test the water including salinity, verify the heater, and review whether a recent deep clean or a moved cave has unsettled the group. Restore one disrupted territory at a time rather than rebuilding the whole layout, and bring persistent wasting, spots, or losses to an aquatic veterinarian — in a brackish-kept group, also double-check that nobody has quietly been topping up with fresh water and diluting the tank.
A cave-by-cave routine is easy to hand over when it is written down, and KinsLe's Care Teams lets each goby cleaning step be assigned and then stamped with the time it was done.