Molly FishVSOscar Fish

Can they live together? Complete Compatibility Analysis

Compatibility Score

🚫 Do Not Mix

Molly Fish and Oscar Fish are fundamentally incompatible due to extreme differences in size, temperament, and dietary needs. Oscars are large, aggressive predators that will view Mollies as food.

Potential Issues

•Oscar Fish will eat Molly Fish.
•Oscars require vastly larger tanks and produce significantly more waste.
•Mollies prefer hard, alkaline water while Oscars prefer soft, acidic water, making stable shared parameters difficult.

Tank Requirements

Temperature

75-80°F (overlap exists, but secondary to other issues)

pH Level

Mollies: 7.5-8.5, Oscars: 6.5-7.5 (conflict)

Minimum Tank Size

75+ gallons (for a single Oscar; Mollies would not be safe in this setup)

About Molly Fish and Oscar Fish

When considering adding Oscar Fish to a tank with Molly Fish, it's crucial to understand their specific needs. Molly Fish and Oscar Fish are fundamentally incompatible due to extreme differences in size, temperament, and dietary needs. Oscars are large, aggressive predators that will view Mollies as food.

Key Differences

Molly Fish: Requires 10 gallons minimum. Usually prefers tropical water conditions.
Oscar Fish: Requires 55 gallons minimum. Usually prefers tropical water conditions.

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