Crayfish Care Guides
Mexican Dwarf Crayfish and Electric Blue Crayfish differ greatly in adult size and compatibility. Choose the guide that matches your crayfish rather than applying one set of rules to both.
General Care
Use a fully cycled freshwater aquarium with aeration, a secure lid, and covered cable openings. Give every crayfish several hiding places, particularly for molting. Keep ammonia and nitrite at zero and change water regularly. Stable, mineral-containing water and a varied diet support shell growth. Do not disturb a crayfish during a molt; leave a clean shed shell for it to consume. Feed directly rather than relying on leftovers. Check medication labels for invertebrate safety, especially copper treatments.
Tank sizes below are planning recommendations for adult care. Aquarium footprint, group size, filtration, and individual behavior can require more space. Use stable conditions within the listed range; avoid sudden changes.
Species and Variety Guides
Mexican Dwarf Crayfish / CPO
- Scientific name / group: Cambarellus patzcuarensis
- Adult size: about 1.5–2 inches
- Temperature: 68–75°F
- pH: 7.0–8.0
- Water hardness: moderate; avoid very soft water
- Aquarium: 10 gallons for a small pair; larger colonies need more floor space and cover
- Temperament: Relatively mild for a crayfish; still territorial
Aquarium setup: Provide numerous small caves, moss, plants, and a sponge-protected filter intake.
Feeding: Sinking invertebrate pellets, vegetables, and occasional suitable protein foods.
Tank mates: Peaceful small fish may work, but predation and nipping remain possible. A species setup is best for raising young.
Breeding: Females carry eggs under the tail. Add dense cover and a separate grow-out space to reduce cannibalism.
Listed fish / animals: Mexican Dwarf Crayfish Breeding Pair. · Mexican Dwarf Crayfish Breeding Colony (6 Crayfish) · Mexican Dwarf Crayfish 2 Breeding Pairs. · Mexican Dwarf Crayfish Breeding Trio · Mexican Dwarf Crayfish Breeding Colony (10 Crayfish) · Mexican Dwarf Crayfish Breeding Colony (12 Crayfish) · Mexican Dwarf Crayfish One Male
Electric Blue / Florida Crayfish
- Scientific name / group: Procambarus alleni
- Adult size: usually about 4–5 inches; some grow larger
- Temperature: 72–79°F
- pH: 7.0–8.0
- Water hardness: moderate
- Aquarium: 20-gallon long or larger for one; substantially more space for additional adults
- Temperament: Territorial and opportunistic
Aquarium setup: Provide sturdy caves, a digging substrate, good aeration, and an escape-proof cover.
Feeding: Sinking crayfish pellets, vegetables, algae-based foods, and occasional aquatic protein.
Tank mates: A single-crayfish setup is safest. It can catch fish, attack other crayfish, and cut or eat plants.
Breeding: Breeding pairs need extra space and separation options. Females carry eggs under the tail; protect hatchlings from adults.
Listed fish / animals: Electric Blue Crayfish
Species references and further reading
Ordering & Shipping
Orders must be placed by Sunday night to ship Monday. Check the individual product listing for available sizes, quantities, and shipping and live-arrival terms.