Species guide
Crystal Red Shrimp Care Guide (Caridina)
Invertebrate
Crystal red shrimp (Caridina cantonensis / bee shrimp) look like painted cherries. Care is not cherry care. They want low TDS, stable GH/KH near zero-to-low, moss, and zero copper. If you want easy color, buy Neocaridina.
- Caridina
- Low TDS
- RO water
- Not cherry
Quick facts
| Temp | 20–24 °C — cooler than many tropical community tanks |
|---|---|
| TDS | Often 100–150 ppm target after remineralize (test, do not guess) |
| GH / KH | Low GH shrimp mineral; KH near 0–1 — not guppy-hard tap |
| pH | Typically 6.0–6.8 once soil/RO settle |
| Volume | 10+ gal / 40 L easier than a 5-gal swing tank |
| Cover | Moss + botanicals; they graze biofilm, not leftover flakes |
| Copper | Zero. Many plant ferts and meds kill them |
| Breeding | Slow vs Neo; berried females need stability, not ‘more food’ |
Overview
Cherry shrimp (Neocaridina) breed in tap if it is stable. Crystal reds are Caridina. Read Neo vs Caridina before you mix them. Mixing usually means the cherries win and the crystals die quietly.
Moss: Java moss. Cycle: fishless. Nano budget: shrimp under $50 is Neo-first — upgrade water control for CRS. Amano: Amano care (different genus, still copper-shy). Tank mates: what fish live with shrimp.
How to actually keep them
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Step 1
Decide RO + remineralizer before you buy shrimp
Tap GH 8+ will molt-kill CRS. Mix RO to target TDS, then shrimp mineral. Do not ‘adjust with vinegar’.
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Step 2
Inert or buffered soil, not mystery dirt
Many CRS keepers use active aquasoil + RO. If you use sand only, you still remineralize — you do not skip testing.
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Step 3
Moss jungle, not a bare show tank
Java moss and leaf litter grow biofilm. CRS graze all day. Hungry CRS on white sand is a husbandry fail.
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Step 4
Skip copper ferts and ‘shrimp-safe’ mystery meds
Read labels. Many all-in-one plant ferts and algae killers are not Caridina-safe.
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Step 5
Water changes small and matched
10–20% with identical TDS/temp. A 50% tap dump is how colonies vanish overnight.
Common problems
White ring of death / failed molt
Why: GH/TDS swing or missing minerals.
Fix: Stop big changes; match TDS; use a shrimp mineral, not garden calcium.
Color fading, hiding constantly
Why: Stress, high TDS, or fish hunting.
Fix: Remove fish; check TDS; more moss.
Berried then drops eggs
Why: Parameter bounce or poor diet/biofilm.
Fix: Stability first; more leaf litter; less ‘snack feeding’.
Sudden deaths after plant fert
Why: Copper or overdose.
Fix: Water change with matched RO mix; switch to shrimp-safe traces.
Tank mates
- Best: CRS-only or CRS + snails that do not eat moss mats.
- Maybe: tiny chili rasboras or CPD in 20+ gal if you accept some shrimplet loss.
- No: guppies (hard water fight), goldfish, most cichlids, male bettas.
- Cherries in the same tank: usually a bad idea (params + hybridization rumors + Neo outcompetes).
Gear for this species
Hikari Shrimp Cuisine Sinking Pellets for Freshwater Shrimp
Thức ăn sinking cho tôm Neocaridina/Caridina — khoáng và vitamin.
Crystalpro Shrimp Minerals 16.9 Oz – Liquid Aquarium Salt & Trace Elements for Freshwater Shrimp Tanks – Supports Caridina & Neocaridina – Molting & Breeding Additive – Invertebrate Tank Conditioner
Nutrafin Fluval shrimp mineral is a powerful support product for ornamental shrimp species, imported from Canada and distributed at Sen Aquatic. This product is among the Top Best Sellers in the Sen Store system, trusted and highly rated by users for its quality and price. Benefits of Nutrafin Fluval shrimp mineral: Provides essential minerals and stabilizes pH for the shrimp breeding ecosystem. Eliminates issues of thin shells and pale coloration. Helps ornamental shrimp grow strong, with a shiny and vibrant protective layer. Reduces the occurrence of shrimp having difficulty molting and dying sporadically.
Aquarium Glue, Clear Coral Glue for Plants, Rocks, Moss, Coral, Stone, Wood – Quick Drying, Fish Safe, Freshwater & Saltwater Aquascaping – 5g (2PCS)
Uses: - Used to attach moss/epiphytes to rocks, driftwood... - Can be applied when the plant or substrate is wet - Gel form, does not dry out like 502 glue over time
Shrimp nano under $50 — Crystal red is a Caridina project, not a tap-water cherry tank
FAQ
Is crystal red the same as cherry shrimp?
No. Cherries are Neocaridina (easier, tap-tolerant). Crystal reds are Caridina bee shrimp (RO + minerals).
Can I keep CRS in tap water?
Only if tap is already very soft and stable — rare. Most people need RO.
Do they need a heater?
Often a small heater to stop night drops, but they prefer cooler than discus. Avoid 28 °C community heat.
Will they breed like cherries?
Slower. You may wait months. Stability beats ‘high protein dumping’.
Safe with Amano shrimp?
Possible in larger tanks; Amano are bigger and compete for biofilm. CRS-only is cleaner.
What plants?
Moss, fern, Anubias, floaters. Skip copper ferts. Carpet plants are optional, not required.
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