New to Your Home · Aquatic
The Goldfish Reality
High-Bio-load Giants and Species-Only Tanks
Goldfish are not bowl fish. They are long-lived carp with big appetites and a lot of waste. 10 lessons on why bowls fail them, single-tail versus fancy goldfish, the cold-water rule, the heavy bio-load and tank size, filtration at 10 to 15 times the tank volume per hour, why they don't belong with tropical fish, sinking foods and swim bladder trouble, goldfish-proof plants, wen trimming with a fish vet, and the 10 to 15 year lifespan.
About this course
Goldfish are one of the most mistreated fish in the hobby, mostly because of the bowl. This course starts by explaining why bowls fail them: ammonia builds up fast, stress stunts growth and lives get cut short. Lesson 2 separates single-tail goldfish, which reach 12 to 14 inches and belong in ponds, from egg-shaped fancies, which reach 6 to 8 inches and suit indoor tanks, and explains why the two shouldn't share a home. Lesson 3 covers the cold-water rule of 65 to 72 degrees with no heater. Lessons 4 and 5 deal with waste: about 30 gallons for the first fancy and 10 to 15 more for each one after, and filtration rated at 10 to 15 times the tank volume per hour. Lesson 6 explains why goldfish don't belong with tropical fish or plecos. Then come sinking foods to help prevent swim bladder trouble, tough plants that survive constant digging, and when a wen that covers the eyes needs trimming with a fish vet. The course ends with the real lifespan, including Paola's goldfish Scrappy, who lived to about 13.
What you'll learn
- Why bowls stunt and poison goldfish, and how single-tails differ from fancies
- The cold-water rule of 65 to 72 degrees, with no aquarium heater
- Tank sizing for a heavy bio-load, and filtration at 10 to 15 times the volume
- Why goldfish need species-only tanks, away from tropical fish and plecos
- Sinking foods for swim bladder health, and plants that survive goldfish digging
- When an overgrown wen needs a fish vet, and planning for a 15-year lifespan
Who this is for
Families who brought home a carnival or pet store goldfish in a bowl; keepers setting up a first fancy goldfish tank; and anyone whose goldfish floats upside down after meals or shares a tank with tropical fish.
Course outline (10 modules)
Quiz & Certificate
Knowledge quiz
After completing all lessons, take a short quiz to test your understanding.
Go to quiz →Completion certificate
Pass the quiz and earn a shareable certificate of completion.
View certificate →Frequently asked questions
Ready to get started?
$9.99 · Lifetime access · 10 lessons