Compatibility Overview
Goldfish and Mystery Snail are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Goldfish | Mystery Snail | Verdict |
|---|---|---|---|
| Temperature | 50–74°F | 68–80°F | ✅ 68–74°F |
| pH Range | 6.5–8.0 | 7.0–8.0 | ✅ 7.0–8.0 |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 12 in | 2 in | ❌ 6× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Goldfish — Carassius auratus
Classic pond and aquarium fish that prefer cool water. Heavy waste producers that require robust filtration. Will eat small fish and shrimp.
Mystery Snail — Pomacea bridgesii
Large, peaceful aquarium snails that graze on algae and detritus. Shell provides some protection but can be harassed by certain fish.
Frequently Asked Questions
Can Goldfish live with Mystery Snail?
Generally not recommended. Goldfish and Mystery Snail are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Goldfish and Mystery Snail together?
A minimum of 100 gallons is recommended for keeping Goldfish and Mystery Snail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Goldfish and Mystery Snail?
68–74°F
Is a Goldfish aggressive toward a Mystery Snail?
Goldfish is peaceful and Mystery Snail is peaceful. Goldfish requires cold water; Mystery Snail requires tropical water. These environments are incompatible.