Cherry Shrimp Care Guide: Temperature, Water Parameters, Breeding
Red cherry shrimp have become the most popular invertebrate for planted nano tanks — and for good reason. They're colorful, peaceful, low-bioload, and easy to keep in water parameters that planted tanks naturally create. But easy ≠ carefree. Even shrimp have a few non-negotiables.
The Essentials at a Glance
- Tank size: 5 gallons minimum (10+ better for a stable colony)
- Water temp: 72–78°F (no heater needed if room is warm)
- pH: 6.5–7.5 (slightly acidic is ideal)
- Population: 1 shrimp per 2 gallons comfortably
- Filtration: Gentle (sponge filter or baffle HOB, see our filter guide)
- Food: Plants + occasional algae wafers or blanched vegetables
Tank Setup for Cherry Shrimp
Minimum size: 5 gallons, but 10+ is safer
A single shrimp survives in 5 gallons. But a breeding colony (which is the fun part) needs stability — more water = more forgiving parameters. In a 10-gallon, pH swings and temperature fluctuations matter less. If you're planning a colony, start at 10.
Dense plants are essential, not optional
Shrimp need hiding spots and food. Good substrate + lots of moss (Java Moss, Christmas Moss) + stem plants = shrimp security + biofilm (baby shrimp food). Without plants, shrimp are stressed and shrimplets starve.
Gentle filtration only
A strong intake can suck in baby shrimp. Use a sponge filter (ideal) or an HOB with a pre-filter sponge on the intake. Sponge vs HOB details here. Skip powerheads and strong flow.
Water Parameters: The Numbers That Matter
| Parameter | Ideal Range | Why It Matters |
|---|---|---|
| Temperature | 72–78°F | Below 65°F = inactivity & slow molt; above 80°F = low oxygen & short lifespan |
| pH | 6.5–7.5 | Acidic water (via aqua soil) aids molting; very alkaline = shell problems |
| GH (hardness) | 6–8 dGH | Minerals for shell growth; too soft = soft shell (molt fails) |
| KH (alkalinity) | 3–6 dKH | Stabilizes pH swings |
| Ammonia/Nitrite | 0 ppm | Any amount stresses shrimp; cycle your tank first |
The shortcut: In a planted tank with aqua soil, parameters naturally drift toward shrimp-friendly (soft, slightly acidic). You don't need to dose anything — just do 25% water changes weekly and let the soil work.
Feeding: Plants Do Half the Work
In an established planted tank, shrimp eat biofilm, algae, and decaying plant matter constantly. Supplemental feeding is optional but recommended for faster colony growth:
- Algae wafers — 1–2 wafers per 5 shrimp, 2–3× per week (check options on Amazon)
- Blanched vegetables — spinach, zucchini, carrot (boil 3 min, cool, place small piece) 1–2× per week
- Avoid: meat-based foods (decay too fast, foul water), anything with seasoning, overfeeding (uneaten food → ammonia spike)
Rule of thumb: Feed only what shrimp finish in 2 hours. Remove leftovers.
The Molt Cycle (Why It's Important)
Shrimp grow by molting — shedding their exoskeleton every 4–8 weeks. Right after a molt, the new shell is soft; a failed molt = death. Molts fail when:
- Water is too soft (GH < 4) — shrimp can't calcify the new shell
- pH swings too much — stress during molt phase
- Water is too warm (80+°F) — metabolism spikes, molt is rushed
- Ammonia/nitrite present — direct toxicity
If you see a shrimp with a stuck molt (new shell won't come off), it's usually too late — avoid it by keeping parameters stable.
Breeding: The Fun Part (It's Easy)
Red cherry shrimp breed readily in good conditions — no special triggers needed. Adult females get a white saddle (eggs) on their backs and carry shrimplets for ~3 weeks, then release dozens of tiny shrimp into the water column. If you have:
- ✅ Stable water (pH 6.5–7.5, 72–78°F)
- ✅ Dense plants (hiding + food for babies)
- ✅ Gentle filtration (no baby-sucking intake)
...the colony will boom on its own. Many keepers end up with too many shrimp, not too few.
Common Mistakes
1. Keeping shrimp with fish that eat them
Bettas, gouramis, and even some tetras will hunt shrimp. Stick to fish that don't nip or predatize, or keep a shrimp-only tank.
2. Doing large water changes without matching parameters
Shrimp are sensitive to sudden pH/temperature swings. Change 25% weekly with aged water at the same temp. If your source water is very different (hard vs soft), match it slowly or remineralize.
3. Overfeeding
Leftover food decays, spiking ammonia. Shrimp are tiny; feed sparingly.
4. No hiding spots
Stressed shrimp hide all day and slow-grow. Plant heavily, add wood, provide moss mats.
FAQ
Do cherry shrimp need a heater?
Not if your room stays 72–78°F. If it drops below 65°F regularly, add a small adjustable heater.
Can I keep cherry shrimp with a betta?
Risky. Some bettas ignore shrimp; others hunt them. If you want to try: heavily planted, lots of hiding spots, watch the betta's behavior for a week. Remove shrimp if the betta hunts.
How many shrimp in a 5-gallon tank?
5–10 shrimp comfortably; more than 15 risks bioload issues unless heavily planted. For breeding colonies, 10 is the sweet spot.
Why did my shrimp die after a water change?
Likely a parameter shock (pH swing, temp drop, or ammonia in tap water). Use aged water, match temperature, and add dechlorinator to tap water before the change.
Disclosure: This site is reader-supported. Some links on this page may be affiliate links, meaning we may earn a small commission if you make a purchase — at no extra cost to you. We only recommend gear we'd use in our own tanks.
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