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STATUS: INCOMPATIBLE ⬌ MATRIX CORRELATION INDEX

Can you keep Assassin Snail and Harlequin Rasbora together?

Algorithmically generated environmental and behavioral compatibility report.

Assassin SnailClea helena
bottom Layersemi-aggressive
incompatible
Harlequin RasboraTrigonostigma heteromorpha
mid Layerpeaceful
INCOMPATIBLE

Algorithmic Assessment

Water acidity (pH) parameters clash. Harlequin Rasbora prefers a pH of 6-6.8, while Assassin Snail requires a pH of 7-8. There is no overlapping safe pH range.

Scientific Parameter Comparison

Cross-reference water chemistry, temperature range envelopes, and physical dimensions of Assassin Snail and Harlequin Rasbora.

Parameter MetricAssassin SnailHarlequin RasboraCalculated Overlap
Temperature Range70°F – 80°F73°F – 80°F73°F – 80°F
pH Chemistry7.0 – 8.06.0 – 6.8No Overlap (Mismatch: 0.2)
Min. Tank Capacity5 Gallons10 Gallons10 Gallons (Minimum)
Aquatic Strata ZonebottommidSeparated Layers
Adult Size (Max)1.0" (3 cm)1.8" (4 cm)Ratio: 1 : 1.8

⚠ Physiological Mismatch Report

Our stocking engine calculations indicate that putting these two species in the same tank causes acute physiological strain. Below are the calculated parameters that violate safe cohabitation ranges:

Acidity/pH Gap0.2 pH difference

Assassin Snail thrives in pH 7-8, while Harlequin Rasbora needs pH 6-6.8.

⚔️ Do Assassin Snail and Harlequin Rasbora Fight?

Environmental or structural requirements between these species clash too heavily to allow cohabitation. Water acidity (pH) parameters clash. Harlequin Rasbora prefers a pH of 6-6.8, while Assassin Snail requires a pH of 7-8. There is no overlapping safe pH range.

🍽️ Swimming Layers & Feeding Competition

To satisfy their dietary requirements, offer a varied feeding schedule. Sinking pellets or wafers are ideal for bottom dwellers, while floating flakes or micro-granules support mid and top dwellers. The Assassin Snail occupies the bottom layer, while the Harlequin Rasbora occupies the mid layer. This separation of swimming zones naturally minimizes direct interactions and reduces competition during feeding times.

📏 Size Difference & Predation Threat

Both species are closely matched in physical dimensions, with Assassin Snail growing to 1.0 inches and Harlequin Rasbora reaching 1.8 inches. This size balance ensures neither species holds a physical dominance advantage.

Assassin Snailbottom Layer
Scientific NameClea helena
Min Tank Capacity5G
Aggressionsemi-aggressive
Temp Envelope70°F - 80°F
pH Chemistry7.0 - 8.0
Scientific NameTrigonostigma heteromorpha
Min Tank Capacity10G
Aggressionpeaceful
Temp Envelope73°F - 80°F
pH Chemistry6.0 - 6.8

Chemistry & Habitat Analysis

Temp Envelope
73°F - 80°F
Shared temperature bounds.
pH Chemistry
No Overlap
Acidity requirements clash.
Combined Min Tank
10 Gallons
Lowest acceptable volume.

Frequently Asked Questions: Assassin Snail & Harlequin Rasbora Compatibility

Are Assassin Snail and Harlequin Rasbora good tank mates?

Water acidity (pH) parameters clash. Harlequin Rasbora prefers a pH of 6-6.8, while Assassin Snail requires a pH of 7-8. There is no overlapping safe pH range.

Can you put Assassin Snail and Harlequin Rasbora in the same tank together?

Environmental or structural requirements between these species clash too heavily to allow cohabitation. Water acidity (pH) parameters clash. Harlequin Rasbora prefers a pH of 6-6.8, while Assassin Snail requires a pH of 7-8. There is no overlapping safe pH range.

What water temperature and pH parameters do Assassin Snail and Harlequin Rasbora need?

Both species require compatible parameters. Assassin Snail needs a temperature of 70°F to 80°F and a pH of 7.0 to 8.0. Meanwhile, Harlequin Rasbora needs a temperature of 73°F to 80°F and a pH of 6.0 to 6.8. Shared overlap range: 73°F–80°F temperature and No safe pH overlap overlap.

What is the minimum combined tank volume required to house Assassin Snail and Harlequin Rasbora?

To successfully house both species together, a baseline of 10 gallons is required. However, because the setup includes territorial behavior from Assassin Snail (semi-aggressive), we recommend an adjusted minimum tank volume of at least 20 gallons (adding a 10-gallon safety buffer) to establish separate visual boundaries and minimize stress.