Compatibility Overview
Mystery Snail and Oscar can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
| Factor | Mystery Snail | Oscar | Verdict |
|---|---|---|---|
| Temperature | 68–80°F | 74–81°F | ✅ 74–80°F |
| pH Range | 7.0–8.0 | 6.0–8.0 | ✅ 7.0–8.0 |
| Temperament | peaceful | aggressive | ❌ Risk |
| Adult Size | 2 in | 14 in | ❌ 7× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
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.
→ Full Mystery Snail care guide
Oscar — Astronotus ocellatus
Intelligent but aggressive cichlids that will eat any fish small enough to fit in their mouth. Require large tanks (75+ gallons) and robust tank mates.
Frequently Asked Questions
Can Mystery Snail live with Oscar?
With significant caution and a larger tank. Mystery Snail and Oscar can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Mystery Snail and Oscar together?
A minimum of 100 gallons is recommended for keeping Mystery Snail and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Mystery Snail and Oscar?
74–80°F
Is a Mystery Snail aggressive toward a Oscar?
Mystery Snail is peaceful and Oscar is aggressive. Large size difference: Oscar (14 in) may predate on Mystery Snail (2 in).