Biofilm does most of the feeding
Dwarf shrimp are not really fed the way fish are fed. Their true staple is biofilm — the thin, living layer of algae, bacteria and microscopic life that coats every leaf, stone, piece of wood and grain of substrate in a mature tank — and a shrimp's whole day is built around picking it off, grain by grain, with its tiny brushes. That is why a settled, planted tank with driftwood, leaf litter and moss can carry a thriving colony on almost no added food, while a brand-new, sterile tank can starve shrimp that are being offered pellets daily: the surfaces themselves are empty. When you ask whether your shrimp are getting enough, you are mostly asking whether the tank has grown enough film — and the shrimp's behaviour answers honestly.
Signs the colony is eating well
Watch the shrimp, not the food dish. Well-fed shrimp graze constantly and unhurriedly — picking at leaves, fanning through moss, working the substrate — and when you do drop in a supplement, the colony converges on it within minutes and stays until it is gone. Through a translucent shrimp's back you can see the gut line: a dark, continuous line running along the body means food is moving through steadily. Females carrying a saddle of eggs, then berries of eggs under the tail, are proof the colony has surplus energy to spend on reproduction, and clean, complete molts left like empty shells on the substrate show growth is proceeding without the shrimp getting stuck halfway out of the old shell. A colony with babies of several sizes at once is a colony whose food supply never really dips.
Supplementing without overfeeding
Added food is a top-up, not the main event: a small piece of a shrimp or algae pellet, a blanched leaf or a dusting of powdered food, offered a few times a week, is plenty for most colonies. Feed in the same shallow dish or corner so you can judge consumption honestly — food gone within a couple of hours means the portion fits; food still sitting there, fuzzy at the edges, the next morning means it was too much, and it should come out before it fouls the water. New tanks need more supplementing than mature ones, and heavily stocked colonies more than sparse ones, so adjust by what disappears rather than by a fixed rule. Indian almond leaves and other botanicals earn a permanent place: as they decay they grow exactly the films and microbes shrimp graze best, feeding the colony for weeks from a single leaf.
Warning signs they are coming up short
The clearest early warning is an empty gut: shrimp with no visible line along the back, picking restlessly and ranging over the whole tank rather than grazing one spot contentedly, are hunting for food that is not there. A colony that never produces babies, or where shrimplets vanish within days of hatching, is usually short of the fine biofilm and powdered-scale food that the young live on. Molts that fail — a shrimp stuck in its old shell — point as much to minerals and water as to food, so check those alongside the menu rather than simply feeding harder. Respond to a shortfall gradually: add botanicals, one extra supplement day, more surface and plants, and re-read the signs over a fortnight. Logging those supplement days in KinsLe's Care Teams keeps the balance — the colony gets its top-ups on schedule, and a well-meaning helper never turns them into daily meals the tank does not need.