Botanic Garden >> Gardening > >> Question and Answer >> Pond and Water Gardening

Stocking a 90-Gallon Pond: Fish and Frog Compatibility

Fish Selection

Koi grow to 3 feet—absolutely unsuitable. Goldfish reach 12+ inches; a few (3-5) are okay. Better choices for 90 gallons:

Rosy Red Minnows: Hardy, colorful, stay small (2-3"), breed easily.
Native Minnows/Shiners: Check local regulations.
Tropicals (Guppies, Platies, White Clouds): Only if you bring them in for winter.

Frogs

Yes, frogs can coexist. They eat insects and some tadpoles may become fish food. Ensure the pond has easy exit points (rocks, logs) so frogs can leave.

Resources

Explore fishpondinfo.com for detailed care guides.

Pond and Water Gardening: Quarantining a New Goldfish for a Pond; Overwintering Pond Goldfish: When to Bring Them Inside; Pond Volume & Pump Size Calculator; Frogs in Your Garden Pond: Friends, Not Foes; Frog and Toad Numbers in a Fish Pond: What's a Safe Balance?; Fish and Frogs Lethargic in Pond: Oxygen Crash or Toxin?; Herons and Frogs Eating Koi/Goldfish: Protection Strategies; Dogs and Cats in the Pond: Do They Eat Fish and Frogs?; Building a Koi Pond in Colorado: Spruce Needles, Size, and Resources; Goldfish and Frogs in Winter: Coexistence and Cold Climate Care

Garden Articles

Fish Die-Off After Algaecide Treatment: Emergency Response

Six Dead Frogs in Fishless Pond: Causes

Stocking a Natural 30-ft Pond for Bug Control

New Preformed Pond: Goldfish Dying in Hours

Fish Kill After Tadpole Hatch: Oxygen Crash

WD-40 Contamination in a 150-Gallon Pond: Emergency Response

Goldfish Lying on Side in 1,200-Gal Pond: Sickness or Old Age?

Plants

Stocking a California Pond with Lake Fish: Compatibility and Mosquito Control

Fish Hiding After Heron Attack: Recovery Timeline

Best Fish for a 90-Gallon Patio Pond

Emergency pH Crash in Koi Pond: Crushed Coral, Baking Soda & Root Cause

Fantail Goldfish Floating at Surface: Swim Bladder Emergency

Can Fancy Goldfish Survive Winter in a Shallow Pond?

500-Gal Pond Goldfish Limit: Biology Over Rules of Thumb