Goldfish

Carassius auratus

Minimum Tank Size

20–30+ gal for fancy types; much larger for common/comet types

Temperature

60–74°F

PH

7.0–8.4

Adult Size

6–12+ in depending on variety

Temperament 

Peaceful, active

Care Difficulty

Intermediate

Diet & Feeding

Quality sinking goldfish pellets plus vegetables and varied supplemental foods.

Care Instructions

Provide large volume, strong filtration and stable cool water; do not treat bowls as permanent housing.

Flow & Filtration

Oversized filtration and high oxygenation; goldfish produce substantial waste.

Planted Tank Suitability

Can eat or uproot many plants; use hardy species or protected plantings.

Tank Mate Compatibility

Good Tank Mates
  • Other Similar Goldfish

Use Caution 
  • Weather Loach
  • White Cloud Mountain Minnow

Avoid
  • Discus
  • Betta
  • Oscar
  • Most Tropical Fish

Compatibility Notes

Match goldfish by body type and swimming ability; avoid warm-water species and fish that nip fins.

Breeding Notes

Egg-scatterer; adults may eat eggs and fry.