Fans open means the menu is in the water
A bamboo shrimp does not hunt, graze, or chase pellets. It parks on wood or rock in the filter outflow, opens the fan-like brushes on its front legs, and strains microscopic particles from passing water, periodically folding each fan into its mouth. Feeding frequency follows that method: a small cloud of finely powdered food once a day in a mature tank with natural drifting matter, and twice a day in a newer or very polished setup where the water carries little. The portion is genuinely small, a pinch of powder or finely crushed flake dissolved first in a cup of tank water, because undissolved lumps blow straight past the fans unused.
Delivering the cloud to the perch
Aim matters more than amount. Release the dissolved food slowly just upstream of where the shrimp sits fanning, or briefly still the filter, let the cloud settle around the perch, and restart the flow after the shrimp has swept its fans through the richest part. Watch the response: a feeding bamboo shrimp fans steadily and folds its fans to its mouth in a regular rhythm, while one that waves half-heartedly in an empty current is telling you the cloud missed or was too thin. Many keepers feed at the same time as the fish, using a little of the fish ration ground extra fine, provided some of it genuinely reaches the shrimp's station.
The substrate-picking warning sign
The clearest hunger signal in this species is misplaced behaviour. A bamboo shrimp that leaves its perch to rake the substrate with its fans is trying to filter-feed off the floor, a makeshift that risks damaging the delicate fans and signals the water column is carrying too little food. Treat a day or two of floor-picking as a feeding review: increase the powdered offering, check that the perch still sits in good flow after any filter or hardscape change, and confirm the fans are intact and fully opening. Occasional molting pauses are normal, and a freshly molted shrimp may hide and skip feeding briefly, but persistent floor work in a shrimp that used to fan happily from its perch should not be ignored.
Water, flow, and food are one system here
Because the meal arrives by current, changes to the current change the diet. A clogged filter, a redirected outflow, or new plants blocking the stream can quietly starve a shrimp in an otherwise well-fed tank, so check the fanning spot whenever the aquarium is rearranged. Very aggressive mechanical filtration can also strip the particles this species lives on, another reason the scheduled powdered feed matters even in a mature setup. If the shrimp abandons fanning entirely, crowds the surface, or several tankmates also seem unsettled, test the water before feeding again, since filter feeders are sensitive passengers in deteriorating conditions and food added to bad water compounds the problem.
A daily task that is easy to assume someone else did
Fish feeding is visible and noisy; releasing a faint cloud upstream of a still shrimp is neither, so this is the aquarium job most often skipped or duplicated without anyone noticing. Giving it a name, a time, and a place on the household rota fixes that. KinsLe Care Teams lets the bamboo shrimp's daily powder feed be assigned to a specific helper and marked complete with a timestamp, so the quietest animal in the tank gets the most deliberate record-keeping.