Oscar and Severum Cichlid Compatibility Overview
Short answer: only with care. Their pH ranges overlap only partly. It can work in a large, well-planted tank if you watch both fish closely for the first weeks.
Oscar and Severum Cichlid can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Oscar is aggressive and Severum Cichlid is semi. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
| Factor | Oscar | Severum Cichlid | Verdict |
|---|---|---|---|
| Temperature | 74โ81ยฐF | 72โ84ยฐF | โ 74โ81ยฐF |
| pH Range | 6.0โ8.0 | 5.5โ7.0 | โ 6.0โ7.0 |
| Temperament | aggressive | semi | โ Risk |
| Adult Size | 14 in | 11.8 in | โ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Oscar โ 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.
Severum Cichlid โ Heros efasciatus
The Severum Cichlid, known for its vibrant colors and peaceful nature, is a popular choice for freshwater aquariums. They have a lifespan of around 5 years and require a minimum tank size of 80 liters. These fish are not schooling fish but are known to be gentle and compatible with a variety of tank mates.
Frequently Asked Questions
Can Oscar live with Severum Cichlid?
With significant caution and a larger tank. Oscar and Severum Cichlid can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Oscar is aggressive and Severum Cichlid is semi. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Oscar and Severum Cichlid together?
A minimum of 100 gallons is recommended for keeping Oscar and Severum Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Oscar and Severum Cichlid?
74โ81ยฐF โ inside Oscar's 74โ81ยฐF and Severum Cichlid's 72โ84ยฐF.
Is a Oscar aggressive toward a Severum Cichlid?
Oscar is aggressive and Severum Cichlid is semi. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely.
Safer Tank Mates for Oscar and Severum Cichlid
The highest-scoring compatible partners for each species in our compatibility data.
For Severum Cichlid
- Silver Dollar โ 85/100
- Black Ghost Knifefish โ 84/100
- Clown Loach โ 83/100
- Angelfish โ 82/100
- Senegal Bichir โ 82/100
Related Compatibility Guides
Tank Size for Oscar and Severum Cichlid
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 180 gal | Best when keeping larger schools or reducing territorial pressure. |