Blue Sifter
Cribroheros robertsoni
A stunning Central American cichlid known for its iridescent turquoise speckling and unique earth-eating behavior. It constantly sifts substrate through its gills to forage, making soft sand absolutely mandatory to prevent gill damage. While mildly tempered compared to many Central American cichlids, it becomes highly territorial when breeding.
Blue Sifter At a Glance
Blue Sifter Tank Requirements
Will Blue Sifter fit in your tank?
Care guides tell you what Blue Sifter needs, the next question is whether your tank can safely provide it. Test Blue Sifter against your tank size, maintenance needs, and the fish you already keep before you buy.
Blue Sifter Water Parameters
Blue Sifter Temperament & Compatibility
Blue Sifter Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Males grow larger, develop more intense turquoise/blue spangling, and possess slightly longer, more pointed dorsal and anal fins. Highly territorial during spawning.
Differs in 2 traits from base species
Also known as: Adult Male, Show Male
Female
Slightly smaller and less intensely colored than the males, but still striking. Will vigorously defend the nesting site alongside the male when breeding.
Differs in 2 traits from base species
Also known as: Adult Female
Juvenile (Grow-out)
Young Blue Sifters are relatively drab and silver, gaining their stunning blue speckles as they mature. Must be moved to a larger tank as they rapidly grow.
Differs in 5 traits from base species
Also known as: Baby, Unsexed Juvenile
Blue Sifter Care Guide Summary
The Blue Sifter, scientifically known as Cribroheros robertsoni, belongs to the Cichlids - Central American family group. Adults reach a maximum size of approximately 20 cm and have a compressed body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the bottom and mid-level zones of the aquarium and produces a high level of biological waste.
To thrive, the Blue Sifter requires a freshwater only aquarium with a minimum volume of 200 litres and a tank length of at least 120 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 7–8 and a general hardness of 8–20 dGH. A moderate water flow is preferred.
The Blue Sifter is a rewarding species to keep, provided its core environmental needs are met. This species is available in 3 varieties: Male, Female, and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Blue Sifter Habitat Setup
When setting up an aquarium for the Blue Sifter, a moderate water flow best suits their natural preferences. Because this species occupies the bottom and mid-level zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour. Keepers should note that expect substrate disturbance, so lightweight décor should be secured and live planted layouts may be difficult to maintain, as this species tends to uproot or consume vegetation.
Blue Sifter Compatibility Notes
Classified as semi-aggressive, the Blue Sifter is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the bottom and mid-level zones can help reduce competition and territorial overlap.
Who Blue Sifter Is Actually For
Blue Sifter is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide someone who understands its individual space requirements. It makes the most sense for a hobbyist who will actually build around its needs, especially sand.
The most common mistake is treating Blue Sifter like any other community fish and skipping the soft sand it needs to forage safely. Another frequent problem is forcing it into an over-busy community when it would do better with more room or more deliberate tankmate choices.
Blue Sifter Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Blue Sifter.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
Frequently Asked Questions About Blue Sifter
How big does Blue Sifter get?
Blue Sifter (Cribroheros robertsoni) typically reaches a maximum adult size of approximately 20 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Blue Sifter need?
A minimum aquarium volume of 200 litres and a tank length of at least 120 cm are recommended for Blue Sifter. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Blue Sifter need?
Blue Sifter thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 7 and 8, and a general hardness of 8–20 dGH. A moderate water flow is preferred.
Is Blue Sifter peaceful or aggressive?
Blue Sifter is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Blue Sifter live alone?
Yes, Blue Sifter can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Blue Sifter have any special tank requirements?
Yes. Blue Sifter benefits from sand (sifters) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Useful setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 2, 2026
- Last updated
- May 2, 2026
- Issues or corrections?
- Contact the editorial team
Plants That Suit Blue Sifter
These plants pair well with Blue Sifter based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Anubias Barteri
Anubias barteri
Belinda's Buce
Bucephalandra belindae
Buce Motleyana
Bucephalandra motleyana
Congo Anubias
Anubias heterophylla
Dwarf Buce
Bucephalandra pygmaea
Fish Similar to Blue Sifter
Pastel Cichlid
Cribroheros alfari
A strikingly beautiful Central American cichlid known for its pastel yellow, pink, and blue iridescent coloration. It is a substrate-sifting species that loves to dig in sand. Like many Central American cichlids, it can be highly territorial and aggressive, especially during breeding. Requires robust filtration and spacious quarters.
Pearl Eartheater
Geophagus brasiliensis
A robust, highly adaptable South American cichlid known for its iridescent pearl-like spangling. While classified as an 'eartheater' (sifting sand for food), they are less obligate sifters than other Geophagus species but still require a soft sand substrate. They are surprisingly tolerant of cooler water and even brackish conditions. They are aggressive for eartheaters, especially when breeding.
Yellow Sand Cichlid
Xenotilapia bathyphilus
An elegant, bottom-dwelling cichlid endemic to Lake Tanganyika. They are highly specialized 'sand-sifters' that take mouthfuls of sand to filter out small invertebrates. They are relatively peaceful for African cichlids but can be territorial during breeding. They are highly skittish and do best in small shoals. A fine sand substrate is absolutely mandatory for their survival and natural behavior.
Cutteri Cichlid
Amatitlania cutteri
A stunning, robust Central American cichlid known for its striking blue eyes, vertical barring, and metallic sheen. While generally considered less aggressive than its close cousin the Convict Cichlid, it is highly territorial during breeding. They form monogamous pairs and are excellent, albeit fierce, parents that will actively dig out spawning pits.
Red Striped Eartheater
Geophagus surinamensis
A large, relatively peaceful South American cichlid famous for its 'earth-eating' behavior. They constantly sift fine sand through their gills to forage for benthic invertebrates. A soft sand substrate is absolutely mandatory for their long-term health to prevent gill damage and stress. While gregarious and best kept in groups, they establish a strict pecking order.
Rainbow Cichlid
Herotilapia multispinosa
Widely regarded as one of the most peaceful and beginner-friendly Central American cichlids. They are known for their vibrant gold, orange, and black coloration which intensifies during breeding. In the wild, they inhabit muddy, slow-moving waters and have specialized teeth for grazing on algae. While peaceful for a cichlid, they become aggressively territorial when spawning and their herbivorous diet means they will happily consume soft-leaved aquarium plants.