Assassin Snail
Clea helena compatibility profile. Plan freshwater shrimp and snail setups by troubleshooting community bioload and water parameter overlap.
Core facts & bioload scores
Typesnail
Adult size1"
Minimum tank10 gal
Group1+
- temperature72-80F
- pH7-8.2
- water_hardnessGH 6-20 dGH | KH 3-12 dKH
- breedingslow egg layer
- plant_safetysafe
- shrimp_safetycaution
- predator_risklow
- cleanup_rolenone
Community setups & swim zone pressure
Success with Assassin Snail requires troubleshooting community setups for predatory risks. Because they occupy the substrate zone, ensure your filtration capacity is ready for their specific bioload score.
Compatibility caveats
- notesSnail-eating predatory snail for controlled use, not a general community cleanup animal.
- caveatWill hunt ornamental snails including ramshorn, bladder, mystery, and nerite snails; do not mix with snails you want to keep.
- caveatShrimp safety is caution because weak, molting, or tiny shrimp may be vulnerable even if healthy adults are usually ignored.
- caveatAfter pest snails decline, feed sinking protein foods so the assassins do not starve.
- caveatStill needs stable, mineralized water for shell health and should be kept away from copper treatments.