GuppyVSGoldfish

Can they live together? Complete Compatibility Analysis

Compatibility Score

🚫 Do Not Mix

Guppies are small, peaceful tropical fish requiring warm water (72-82°F). Goldfish are large, messy coldwater fish preferring cooler water (65-72°F). Their temperature, dietary, and environmental needs are fundamentally incompatible. Goldfish will eat guppies and outcompete them for resources.

Potential Issues

•Goldfish will view guppies as food and will likely eat them.
•Goldfish produce immense waste, requiring powerful filtration and frequent water changes that stress delicate guppies.
•The required cool water temperature for goldfish will weaken guppies' immune systems, leading to disease and death.

Tank Requirements

Temperature

Incompatible. Guppy: 72-82°F, Goldfish: 65-72°F.

pH Level

Guppy: 6.8-7.8, Goldfish: 7.0-7.4 (overlap possible but irrelevant due to temperature conflict).

Minimum Tank Size

Not applicable for mixing. For goldfish alone, minimum 20-30 gallons for one fancy goldfish, plus 10-20 gallons per additional fish.

About Guppy and Goldfish

When considering adding Goldfish to a tank with Guppy, it's crucial to understand their specific needs. Guppies are small, peaceful tropical fish requiring warm water (72-82°F). Goldfish are large, messy coldwater fish preferring cooler water (65-72°F). Their temperature, dietary, and environmental needs are fundamentally incompatible. Goldfish will eat guppies and outcompete them for resources.

Key Differences

Guppy: Requires 5 gallons minimum. Usually prefers tropical water conditions.
Goldfish: Requires 20 gallons minimum. Usually prefers coldwater water conditions.

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