About the Red Ryukin Goldfish The Red Ryukin Goldfish is a vibrant, ornamental fish known for its deep, rounded body and pronounced hump behind the head. It is characterized by its bright red coloration and flowing fins. Ryukins are a fancy goldfish variety, selectively bred for their unique body shape. 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