You rarely see the fish you are cleaning around
Kuhli loaches spend the day hidden — buried in soft substrate with just the head out, threaded through leaf litter, or packed into caves and coconut huts in surprising numbers. That invisibility is what makes cleaning their tank risky in a specific way: the fish most likely to be harmed is the one inside the decoration you just lifted carelessly or underneath the patch of sand you are about to vacuum. Kuhlis are also scaleless-bodied and sensitive to stirred-up waste and sudden chemistry changes, so the whole approach has to be slow, soft and deliberate. Assume every shelter is occupied, every time.
Clean at kuhli o'clock
Work in the evening under dim light, when the loaches begin emerging on their own terms; a fish already out and active tolerates nearby cleaning far better than one dragged from sleep. Have temperature-matched, dechlorinated water ready before you start. Before the siphon enters the tank, do a slow visual pass: note which caves, tubes and wood pieces the kuhlis favour — often one packed communal hide — and plan to clean those last and least. Dimming the room also keeps the other tank residents calmer while you work low and slow.
Lift, look, then siphon
Take decorations out one at a time, lifting each slowly and tilting it over the tank so any loach inside can slip back into the water rather than being carried to a bucket unnoticed — and check the bucket at the end for the same reason, since a kuhli can ride out hidden in a plant or ornament. Keep at least half the tank's cover in place at all times so the fish always have somewhere intact to retreat. Hover the siphon just above the sand to lift surface waste; do not plunge it into the substrate, because burrowed kuhlis sit in the top layer and a deep vacuum both injures and terrifies them. Rinse filter media in removed tank water, wipe only the viewing glass, and refill gradually against a rock or the glass to keep the sand — and the burrows in it — undisturbed.
Signs your approach is working
On a good evening after a gentle clean, the kuhlis come out at dusk as usual, looping over the sand and through the plants in their loose, snaking line, and they take food normally. Loaches that stay buried for days, appear at the surface repeatedly, or show frayed fins may have been through too rough a session — or may be reacting to waste stirred up faster than the filter cleared it. Make the next clean lighter and slower. Logging which hides you lifted and how the loaches behaved in KinsLe with Care Teams builds the shared knowledge that keeps this secretive fish safe during cleans.