Assassin Snail tank mates
A targeted tool, not a permanent stocking. Use for a pest snail problem, then plan what happens when the pest snails are gone.
Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.
Best tank mates (on file)
Merged from conservative safest and best with fields — de-duplicated by species.
The Assassin Snail profile lists Cherry Barb as both safe and a recommended pairing. Cherry Barb schools in groups of 6 or more, so plan room for the whole group rather than one fish. Cherry Barb grows bigger than Assassin Snail (5cm vs 2.5cm). Stock the Assassin Snail group large enough to outnumber the Cherry Barb, or the smaller fish ends up bullied or off food. Cherry Barb swims in the middle zone while Assassin Snail stays in the bottom, so the two will not crowd the same water column.
The Assassin Snail profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish grows bigger than Assassin Snail (6cm vs 2.5cm). Stock the Assassin Snail group large enough to outnumber the Corydoras Catfish, or the smaller fish ends up bullied or off food.
The Assassin Snail profile lists Harlequin Rasbora as both safe and a recommended pairing. Harlequin Rasbora schools in groups of 6 or more, so plan room for the whole group rather than one fish. Harlequin Rasbora grows bigger than Assassin Snail (5cm vs 2.5cm). Stock the Assassin Snail group large enough to outnumber the Harlequin Rasbora, or the smaller fish ends up bullied or off food. Harlequin Rasbora swims in the middle zone while Assassin Snail stays in the bottom, so the two will not crowd the same water column.
The Assassin Snail profile lists Neon Tetra as both safe and a recommended pairing. Neon Tetra schools in groups of 6 or more, so plan room for the whole group rather than one fish. Water parameters barely overlap between the two, so check the temperature and pH ranges on both profiles before stocking. Neon Tetra swims in the middle zone while Assassin Snail stays in the bottom, so the two will not crowd the same water column.
Risky or situational
From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Fish to avoid with Assassin Snail
From the unsafe list — predation, aggression, or space rules on this profile.
Nerite Snail conflicts with Assassin Snail on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Mystery Snail conflicts with Assassin Snail on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Cherry Shrimp conflicts with Assassin Snail on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Tank size and groups
- Published minimum for Assassin Snail: 30L — group minimum 1 .
- Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
- Nearest litre hub to this minimum: 30L hub.
Plan before you buy
Pair checks for every mix, then multi-species stocking in the builder.
Filtration & heating
A 30L minimum tank for Assassin Snail needs a filter rated for at least 120L/hr turnover and a heater maintaining 20–28°C.
Similar fish (same category)
- Amano Shrimp — min 40L
- Blue Dream Shrimp — min 20L
- Cherry Shrimp — min 20L
- Ghost Shrimp — min 40L
- Malaysian Trumpet Snail — min 20L
- Mystery Snail — min 40L
- Nerite Snail — min 20L
- Bamboo Shrimp — min 80L