Cherry Shrimp Feeding: Diet, Portions, and the Overfeeding Trap
Cherry shrimp mostly feed themselves, grazing biofilm and algae all day, which is exactly why it's so easy to overfeed one on purpose without realizing how little it actually needs.
Cherry Shrimp Feeding: Diet, Portions, and the Overfeeding Trap
Cherry shrimp mostly feed themselves. In an established, planted tank, a colony spends most of its day picking biofilm and algae off every surface it can reach, which is exactly why it's so easy to overfeed one on purpose without realizing how little it actually needs on top of that. For the rest of their care needs, see our complete Cherry shrimp care guide.
The Staple Diet: Mostly Grazing, Lightly Supplemented
Cherry shrimp are omnivorous scavengers. Aquarium Co-Op and Aquariadise both describe algae, biofilm, and detritus as the backbone of their diet in a mature tank, supplemented with commercial shrimp or sinking foods, and occasional blanched vegetables like zucchini or spinach. That grazing habit is a big part of why cherry shrimp shouldn't go into a brand-new tank, our tank setup guide covers why a tank needs real biological maturity, not just a finished nitrogen cycle, before shrimp go in.
On top of that natural grazing, a sinking wafer food a couple of times a week rounds out the diet with protein and plant matter shrimp can't get from grazing alone. It's formulated for bottom feeders generally, catfish and loaches included, but shrimp graze on it readily since it sinks and softens right where they already forage.
Driftwood and dried Indian almond leaves are worth adding for the same reason. According to Aquarium Co-Op, a decomposing almond leaf grows a layer of biofilm and infusoria that shrimp and their offspring graze on for days, on top of releasing tannins that gently soften and tint the water. It's a genuinely useful feeding aid disguised as tank decor.
Portions: Smaller Than You'd Guess
A piece of food no larger than a pea, or a quarter of a small wafer, is enough for a colony of 10 to 20 shrimp. Shrimp Science puts the practical rule simply: feed only what the colony clears within 2 to 3 hours, and if food from the last feeding is still sitting there, skip the next one rather than adding more on top of it.
The Overfeeding Trap
Cherry shrimp themselves won't gorge, but that's exactly what makes overfeeding easy to do by accident: their stomachs are so small that it takes very little leftover food to start decomposing. According to Shrimp Science, uneaten food breaks down into ammonia and nitrite, both toxic to shrimp at levels that wouldn't bother a lot of fish, while underfeeding mostly just risks lower survival among the tiniest baby shrimp, who lean more heavily on biofilm than adults do. When genuinely unsure, underfeed. A healthy colony grazing an established, planted tank can go a day or two between deliberate feedings without any issue.
Calcium and Minerals: Feeding for the Molt, Not Just the Meal
Molting is constant for this species. Shrimp Science notes adult shrimp molt roughly every 3 to 4 weeks, with younger, faster-growing shrimp shedding as often as every 1 to 2 weeks. Every one of those molts pulls calcium and minerals out of the water and diet to build the next shell, so a calcium-poor diet is a genuine, common cause of a failed or soft molt, covered in more depth in our health issues guide. A quality sinking food, occasional blanched vegetables, and stable water hardness (more on GH in our tank setup guide) cover most of that need without a dedicated supplement.
Part of a cherry shrimp's calcium strategy is remarkably direct: it eats its own shed shell. Shrimp Science confirms it's safe, and generally a good idea, to leave a molted exoskeleton in the tank for a day or two rather than removing it, since the shrimp that just molted (and its tankmates) will pick it apart to reclaim the calcium and minerals already locked inside it, giving the fresh, soft new shell underneath a real head start on hardening. The only real exception is a tank already dealing with a parasite or bacterial problem, where old shells are better removed just in case.
Foods and Habits to Avoid
Skip anything treated with pesticides, live plants from a store are sometimes treated with snail-killing chemicals that are just as deadly to shrimp, our health issues guide covers copper specifically, which shows up in some of those treatments. Avoid dumping in large amounts of vegetable matter at once, and never add more food just because a previous portion is untouched, that's the overfeeding trap described above in miniature.
For the rest of their setup and health needs, see our Cherry shrimp cost guide, handling guide, health issues guide, and tank setup guide. The Cherry shrimp encyclopedia profile has the full natural history, or browse the rest of our Invertebrates care guide category.
Sources & Further Reading
❓ Frequently Asked Questions
What do cherry shrimp eat?
Mostly biofilm, algae, and detritus they graze off every surface in the tank, which Aquarium Co-Op and Aquariadise both describe as the bulk of a healthy cherry shrimp's diet in an established aquarium. On top of that, offer a sinking wafer food a couple of times a week, plus occasional blanched vegetables. They're true omnivores and scavengers, not picky eaters.
How often should I feed cherry shrimp, and how much?
A piece of food no bigger than a pea, or a quarter of a small algae or sinking wafer, is plenty for a colony of 10 to 20 shrimp, offered every day or two. The general rule from Shrimp Science is to feed only what a colony clears within 2 to 3 hours, and to skip a feeding entirely if there's still food from last time.
Is it really that easy to overfeed cherry shrimp?
Yes, more than almost any other animal on this site. Cherry shrimp themselves won't overeat, but their stomachs are tiny, so it takes very little uneaten food to start decomposing and spiking ammonia and nitrite, both of which are highly toxic to shrimp even in small amounts. When in doubt, underfeed rather than overfeed.
Why do cherry shrimp need calcium in their diet?
To build a solid new shell after every molt, which for an adult happens roughly every 3 to 4 weeks according to Shrimp Science, more often for younger, faster-growing shrimp. A calcium- or protein-poor diet weakens the new exoskeleton and is one of the more common causes of a failed molt, covered in more detail in our health issues guide.
Should I remove a shrimp's shed shell after it molts?
No, leave it in the tank for a day or two. Shrimp (including the one that just molted) eat the discarded shell to reclaim the calcium and minerals in it, which directly supports hardening the new shell underneath. The only exception is a tank dealing with a parasite or bacterial outbreak, where old shells should be removed instead.
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Written by Mike
Mike is the founder of Beastly Facts and a lifelong reptile enthusiast. He shares his home with Dex, a bearded dragon with strong opinions about crickets and basking schedules. Mike writes in-depth care guides, animal facts, and the occasional short story about life with exotic pets.
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