* Water Temperature: Garra rufa prefer warmer water temperatures (around 75-82°F) than goldfish (68-72°F). Maintaining a comfortable temperature for both species is difficult, potentially stressing one or both.
* Feeding: Garra rufa are primarily herbivores, feeding on algae and detritus. Goldfish, on the other hand, are omnivores and require a varied diet. Feeding both species correctly can be challenging.
* Water Conditions: Garra rufa are more sensitive to water parameters like ammonia and nitrates than goldfish. The presence of goldfish can contribute to fluctuations in water quality that can harm garra rufa.
* Aggression: While garra rufa are typically peaceful, goldfish can be aggressive, especially towards smaller fish. This aggression could lead to injuries or stress for the garra rufa.
* Disease Transmission: Although both species are relatively hardy, disease transmission is always a risk when keeping different species together.
In summary: Keeping garra rufa and goldfish together is not a good idea due to their differing water parameters, feeding requirements, and potential for aggression and disease transmission. It is best to keep them in separate tanks to ensure their health and well-being.