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Cardinal Sulawesi shrimp are the showstopper of the Sulawesi shrimp family - deep red body with bright white spots and white "antennae" at the front. Found exclusively in Lake Matano, Sulawesi, Indonesia. Demands alkaline tropical water (pH 7.8+, 80°F+, mineralized) - opposite of every other commonly-kept Caridina species. Stunning when conditions are right; difficult to source.
Native range: Lake Matano, Sulawesi, Indonesia. Aquarium specimens enter the trade primarily through captive-bred sources - selective breeding programs in Taiwan, Germany, the United States, and Indonesia produce the color-line specimens you find at LFS and online vendors. Wild-caught stock of any shrimp species is increasingly rare and often less hardy than captive-bred lines.
Tank size: 10 gallons is the practical minimum. Shrimp bioload is low - colonies of 50+ adults thrive in 10-gallon tanks with adequate biofilm and filtration. Water parameters: pH 7.8-8.4, temperature 77-86°F, hardness 4-8 dGH, 4-8 dKH. Filtration should be sponge-filter or matten-filter based to prevent shrimp and shrimplets from being sucked into intakes. Avoid HOB filters with strong suction unless modified with sponge pre-filters.
Substrate: depends on species. Neocaridina tolerate any inert substrate (gravel, sand, or planted aquarium soil). Caridina (CRS, Taiwan Bee) require active substrate (ADA Amazonia, Fluval Stratum) that buffers pH down to 5.5-6.8 and maintains soft water. Sulawesi shrimp require buffered alkaline substrate or crushed coral additives.
Plants: Java moss, Christmas moss, Subwassertang, and other fine-leaved species are essential - they provide grazing surface area for biofilm (the primary shrimp food) and cover for shrimplets. Heavy planting dramatically improves colony health and breeding rates.
Cardinal Sulawesi Shrimps eat biofilm continuously and supplement with periodic protein/algae feedings. Primary diet: Biofilm, algae, veggies, sinking Caridina pellets. Feed sparingly - shrimp can survive on biofilm alone in mature tanks for weeks. Over-feeding is the primary cause of water quality problems in shrimp tanks. Best feeding practice: small amount once every 2-3 days, removed within 2-4 hours if uneaten.
Supplemental foods worth rotating: Indian almond leaf (for tannins + grazing surface), mulberry leaf, blanched spinach/zucchini/cucumber (small pieces, removed after 24 hours), snowflake food, mineral stones (Montmorillonite clay), and species-specific commercial foods like Bacter AE, Shrimp Cuisine, or Borneo Wild biofilm enhancers.
Safe: Other Sulawesi shrimp (Harlequin, White Glove), Sulawesi snails (Tylomelania).
Avoid: Any other shrimp species, any fish at standard FW parameters, copper meds.
Adult shrimp can defend against most very small fish, but shrimplets (newly-hatched, sub-3mm) are essentially defenseless and will be eaten by anything fish-shaped. Species-only tanks produce the most prolific colonies; community tanks with fish work but reduce shrimplet survival rate significantly.
Difficult. Specialized Sulawesi parameters mandatory. Breeding triggers across most shrimp species: stable parameters, biofilm-rich environment, varied diet, moderate temperatures (slightly warmer than maintenance temperature often triggers breeding cycles). Female shrimp signal readiness by carrying eggs under the tail (called "berried" - eggs visible as a clutch of small spheres). Male shrimp pursue females immediately after molting.
Parameter mismatch (most common); shipping mortality from Indonesia; substrate buffer exhaustion; very limited US supply.
Cardinal Sulawesi shrimp are the showstopper of the Sulawesi shrimp family - deep red body with bright white spots and white "antennae" at the front. Found exclusively in Lake Matano, Sulawesi, Indonesia. Demands alkaline tropical water (pH 7.8+, 80°F+, mineralized) - opposite of every other commonly-kept Caridina species. Stunning when conditions are right; difficult to source.
Tank size: 10 gallons is the practical minimum. Shrimp bioload is low - colonies of 50+ adults thrive in 10-gallon tanks with adequate biofilm and filtration. Water parameters: pH 7.8-8.4, temperature 77-86°F, hardness 4-8 dGH, 4-8 dKH. Filtration should be sponge-filter or matten-filter based to prevent shrimp and shrimplets from being sucked into intakes. Avoid HOB filters with strong suction unless modified with sponge pre-filters.
The Cardinal Sulawesi Shrimp is rated advanced (parameter-specific) difficulty on this care sheet. It needs a tank of at least 10 gallons and a temperature of 77-86°F. Adults reach about 1.0-1.2 inches and live 1.5-2 years. Cardinal Sulawesi shrimp are the showstopper of the Sulawesi shrimp family - deep red body with bright white spots and white "antennae" at the front.
Cardinal Sulawesi Shrimps eat biofilm continuously and supplement with periodic protein/algae feedings. Primary diet: Biofilm, algae, veggies, sinking Caridina pellets. Feed sparingly - shrimp can survive on biofilm alone in mature tanks for weeks. Over-feeding is the primary cause of water quality problems in shrimp tanks. Best feeding practice: small amount once every 2-3 days, removed within 2-4 hours if uneaten.
Safe: Other Sulawesi shrimp (Harlequin, White Glove), Sulawesi snails (Tylomelania). Avoid: Any other shrimp species, any fish at standard FW parameters, copper meds. Adult shrimp can defend against most very small fish, but shrimplets (newly-hatched, sub-3mm) are essentially defenseless and will be eaten by anything fish-shaped. Species-only tanks produce the most prolific colonies; community tanks with fish work but reduce shrimplet survival rate significantly.
The Cardinal Sulawesi Shrimp reaches about 1.0-1.2 inches as an adult and lives 1.5-2 years with good care. Adult shrimp can defend against most very small fish, but shrimplets (newly-hatched, sub-3mm) are essentially defenseless and will be eaten by anything fish-shaped.
Parameter mismatch (most common); shipping mortality from Indonesia; substrate buffer exhaustion; very limited US supply. Keeper note: Alkaline mineralized water + tropical temperatures + Sulawesi-specific substrate (crushed coral or specialty Sulawesi-mineral salts). Cannot mix with any other commonly-kept shrimp due to parameter incompatibility.
Specialized Sulawesi parameters mandatory. Breeding triggers across most shrimp species: stable parameters, biofilm-rich environment, varied diet, moderate temperatures (slightly warmer than maintenance temperature often triggers breeding cycles). Female shrimp signal readiness by carrying eggs under the tail (called "berried" - eggs visible as a clutch of small spheres). Male shrimp pursue females immediately after molting.
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