About the Red Oranda Goldfish Oranda Goldfish are one of the most popular goldfish varieties. They are characterized by a round body and benign growth on their head known as a "wen". Goldfish are high waste producers so weekly water changes and larger filters are recommended to keep the water clean. Also make sure the water is well oxygenated. Their average lifespan is 10-15 years. Husbandry & Care Temperament: Peaceful Minimum Tank Size: 40 Gallons for 2x Goldfish and effective filtration. Add 10-15 gallons of water for each additional fish. Water Temperature: 64-78 °F Water pH: 6.0-8.0 Social Group: 2+ Individuals Diet: Omnivorous; Commercial Flakes & Pellets suited for goldfish, algae, algae wafers, detritus, Frozen Brine Shrimp/Bloodworms Compatible with: Due to the bio load of goldfish, they are often kept in species-only aquariums. However, with a large enough tank footprint, goldfish may be kept with platies, dojo loaches, and bristlenose plecos