Finding the best food for your cherry shrimp colony isn't just about picking the right pellet off the shelf. It's about understanding how shrimp actually eat, what nutrients keep a colony thriving, and which common foods — including ones sold in aquarium stores — contain copper, which is toxic to shrimp even in tiny amounts.
By the end of this guide, you'll know exactly what to feed, how often, how much, and what to watch out for when choosing commercial shrimp foods.
What Do Cherry Shrimp Actually Eat? (Natural Diet First)
Cherry shrimp (Neocaridina davidi) are omnivorous scavengers in the wild. They graze constantly — not in big meals, but in tiny, ongoing nibbles. Their natural diet includes algae, biofilm (a thin layer of beneficial microorganisms that coats surfaces in any healthy tank), decaying plant matter, and tiny organisms living in the substrate.
That grazing behavior is important to understand. Cherry shrimp aren't waiting for a pellet to drop. They're working all day, picking at surfaces, turning over bits of debris, and processing whatever organic matter they find.
The best feeding strategy mirrors this natural pattern: provide a varied diet in small amounts, let them graze in between, and resist the urge to dump food in twice a day like you would for fish.
The #1 Food Source Most Shrimp Keepers Overlook: Biofilm
Biofilm is the most important food in any shrimp tank — and it costs nothing. It's the thin, slightly hazy coating you'll see on driftwood, rocks, plant leaves, and tank glass in a mature aquarium. Under a microscope, it's teeming with bacteria, microalgae, and tiny organisms that cherry shrimp absolutely love.
A new tank often struggles to sustain a cherry shrimp colony not because of water chemistry alone, but because there's not enough biofilm yet. The tank hasn't had time to mature.
How to Encourage Biofilm Growth
- Add driftwood, cholla wood, or Indian almond leaves to the tank — these break down slowly and generate biofilm as they decompose
- Avoid over-cleaning the tank — some algae on the back glass is a resource, not a problem
- Let the tank cycle and mature for 4–6 weeks before adding shrimp
- Use a sponge filter — the sponge surface itself becomes a rich biofilm colony that shrimp will constantly graze
I've watched cherry shrimp ignore fresh food entirely for hours, preferring to pick at a piece of driftwood or swarm over a moss ball. That's biofilm at work. It's not dramatic, but it's the foundation of a healthy colony.
Best Commercial Foods for a Cherry Shrimp Colony
When you do supplement with commercial food, these are the categories that actually deliver results. Not all shrimp foods are equal — and some are actively harmful (more on that in the copper section below).
1. Shrimp-Specific Sinking Wafers and Pellets
These are the backbone of a supplemental feeding routine. Look for products designed specifically for freshwater shrimp — not generic tropical fish food. Good shrimp pellets are small, sink quickly, and contain plant-based protein sources alongside spirulina (a type of blue-green algae packed with nutrients).
Brands like Hikari Shrimp Cuisine, Glasgarten Shrimp Dinner, and Dennerle Shrimp King Complete are frequently recommended in the shrimp-keeping community — and for good reason. They sink fast, break apart slowly, and don't cloud the water as badly as cheaper alternatives.
2. Algae Wafers
Algae wafers serve as a solid base food and are usually safe for shrimp when you check the ingredient list for copper sulfate (more on this below). Shrimp will swarm over an algae wafer and work on it for hours. One small wafer broken in half is enough for a colony of 20–30 shrimp.
3. Snowflake Food (Soybean Hulls)
Snowflake food is one of the most popular shrimp-specific foods, and it earns the reputation. It's made from soybean hulls and expands in water into a white, fluffy texture that cherry shrimp love to pick apart. It breaks down slowly, doesn't pollute the water quickly, and provides a high-fiber food source that supports healthy molting (the process where shrimp shed their old shell to grow).
4. Dried Leaves: Indian Almond and Mulberry
Indian almond leaves (also called Catappa leaves) are a shrimp keeper's secret weapon. They release tannins — natural compounds that soften water slightly and have mild antibacterial properties. More importantly, shrimp graze on the biofilm that grows on decomposing leaves. Mulberry leaves are another excellent option, rich in protein and well-accepted by cherry shrimp.
| Food Type | Key Benefit | Frequency | Copper Risk? |
|---|---|---|---|
| Shrimp-specific pellets | Complete nutrition | 2–3x per week | Check label |
| Algae wafers | Plant nutrition, grazing | 1–2x per week | Often YES — check |
| Snowflake food | Fiber, molting support | 2x per week | No |
| Indian almond leaves | Biofilm, tannins | Leave in permanently | No |
| Mulberry leaves | Protein, grazing | 2–3x per week | No |
| Blanched vegetables | Vitamins, variety | 2x per week | No |
Best Vegetables and Home Foods for Cherry Shrimp
Cherry shrimp accept a wide range of blanched vegetables. These are cheap, easy to prepare, and give your colony variety that commercial food alone can't match.
Best Vegetables for Cherry Shrimp
- Zucchini (courgette) — the most universally accepted; blanch a thin slice and drop it in
- Spinach — high in minerals; blanch briefly to soften
- Cucumber — loved by shrimp, high water content; remove skin before blanching
- Kale and romaine lettuce — good vitamin sources; blanch well
- Blanched peas — skin removed, split in half; excellent for variety
- Carrot (lightly steamed) — harder texture; shrimp graze on it for hours
The prep is the same for all of them: blanch in boiling water for 30–60 seconds, cool completely in dechlorinated water, then drop in the tank. Remove any uneaten pieces after 3–4 hours to protect water quality.
The Copper Problem: How to Read Shrimp Food Labels
This is the section that could save your colony's life. Copper is extremely toxic to invertebrates — including cherry shrimp. Concentrations that are completely harmless to fish can kill shrimp within hours.
The frustrating part: copper sulfate is a common ingredient in many fish foods and some aquarium treatments. It appears on labels as 'copper sulfate,' 'cupric sulfate,' or sometimes just listed under 'mineral supplements.'
How to Check Food Labels
- Flip the food package and read the ingredient list — not just the front label.
- Search for: copper sulfate, cupric sulfate, or copper chelate in the ingredients.
- If any of these appear, do not use that food in a shrimp tank.
- When in doubt, look for products specifically labeled 'shrimp safe' or marketed for invertebrates.
I once tested a popular brand of algae wafer in a shrimp-only tank without checking the label first. Within 24 hours, three shrimp died and several others showed erratic behavior. The culprit was copper sulfate listed eighth in the ingredient list. Always check — every time.
[EXTERNAL LINK: Shrimpfever — copper toxicity in shrimp tanks explained]
Cherry Shrimp Feeding Schedule — Weekly Plan
Cherry shrimp don't need daily feeding, especially in a mature, planted tank. Overfeeding is the fastest way to foul the water and crash a colony. Here's a balanced weekly schedule that provides variety without stressing water quality.
| Day | Morning Feed | Notes |
|---|---|---|
| Monday | Shrimp pellets (small portion) | Remove uneaten food after 3 hrs |
| Tuesday | No feeding | Let them graze on biofilm |
| Wednesday | Blanched zucchini slice | Remove after 4 hrs |
| Thursday | No feeding | Biofilm grazing day |
| Friday | Snowflake food (small pinch) | Stays clean longer; can leave 6 hrs |
| Saturday | Mulberry or almond leaf | Can leave in indefinitely |
| Sunday | No feeding | Water change day if scheduled |
Notice there are three no-feeding days per week. This isn't neglect — it's intentional. Those days let your shrimp graze naturally on biofilm and prevent ammonia spikes from leftover food.
How Often to Feed Your Cherry Shrimp Colony
Feed 3–4 times per week in tiny amounts. That's the rule. Each feeding should be small enough that shrimp finish it within 2–3 hours.
A colony of 20 shrimp needs roughly the size of a pea in pellets — or half a thin zucchini slice — per feeding. If food is still sitting there after 3 hours, you've given too much.
Colony Size Feeding Guide
| Colony Size | Pellet Portion | Veggie Portion |
|---|---|---|
| 5–10 shrimp | 2–3 micro pellets | Quarter slice of zucchini |
| 10–30 shrimp | 4–6 pellets or pea-sized | Half a thin zucchini slice |
| 30–50 shrimp | 8–10 pellets | One full thin zucchini slice |
| 50+ shrimp | Adjust — watch the 2-hr rule | 1–2 slices, monitor closely |
Calcium for Shell Growth: The Missing Piece
Here's something most beginner shrimp guides leave out entirely: calcium. Cherry shrimp need calcium to build and maintain their shells. A calcium deficiency shows up as failed molts (shrimp get stuck in their old shell and die trying to shed it) or thin, fragile shells that crack easily.
How to Supplement Calcium
- Add a small piece of cuttlebone — the same type sold for birds — to the tank. It dissolves slowly and releases calcium into the water. Replace every 4–6 weeks.
- Use mineral-rich water (GH 6–8 is the target for cherry shrimp — GH stands for General Hardness, a measure of dissolved minerals)
- Feed foods naturally rich in calcium: spinach, kale, and blanched broccoli all contain useful calcium levels
- Crushed coral or a small amount of limestone rock in the filter can also raise mineral levels gradually
If your shrimp are dying after molting — often found dead near a shed shell — calcium deficiency is a likely culprit. It's one of the most underdiagnosed causes of shrimp loss in beginner tanks.
Frequently Asked Questions
What is the best food for a cherry shrimp colony?
Biofilm is the most important food source — it's free and grows naturally in any mature tank. For supplemental feeding, shrimp-specific sinking pellets, snowflake food, blanched vegetables (especially zucchini and spinach), and dried leaves like Indian almond and mulberry all provide excellent nutrition. Rotate between these for best results.
How often should I feed my cherry shrimp?
Feed 3–4 times per week in very small amounts. Each portion should be consumed within 2–3 hours. Cherry shrimp graze continuously on biofilm between feedings, so daily feeding is unnecessary and risks fouling the water. Three no-feeding days per week is completely normal and healthy.
Can cherry shrimp eat regular fish food?
Some fish foods are safe, but many contain copper sulfate, which is toxic to shrimp — even in small amounts. Always read ingredient labels before using any fish food in a shrimp tank. Look specifically for 'copper sulfate' or 'cupric sulfate' in the ingredients and avoid those products entirely.
What vegetables can cherry shrimp eat?
Zucchini, spinach, cucumber, kale, romaine lettuce, blanched peas (skin removed), and lightly steamed carrot all work well. Always blanch vegetables first to remove surface residue and soften the texture. Remove uneaten pieces after 3–4 hours to protect water quality.
Why are my cherry shrimp not eating the food I give them?
If cherry shrimp ignore food, it usually means the tank has enough biofilm and natural food for them. That's actually a good sign. It could also mean the food is too large, too hard, or unfamiliar. Try breaking pellets into smaller pieces, blanching vegetables more thoroughly, or switching to snowflake food, which most shrimp accept readily. Author Bio: This article was written by an aquarium care specialist with over 10 years of hands-on experience breeding and maintaining freshwater shrimp colonies, including cherry shrimp, crystal red shrimp, and caridina species. Their recommendations are based on direct colony observation, aquatic invertebrate nutrition research, and consultation with experienced shrimp breeders in the international aquascaping community.