Fish Guide

Best Fish for Your Everyday Aquaponics System

Compared by ease, taste, and family-friendliness — so you pick the right fish the first time.

Our top pick for beginners: Tilapia. They handle temperature swings, tolerate beginner water quality mistakes, grow fast, and taste great. If you live where tilapia is restricted, catfish is the next best choice.

Tilapia

Easy
Water Temp:72-86°F
pH Range:6.5-8.0
Growth Rate:Fast (6-8 mo)
Best System:Any
Flavor:Mild white fish

The workhorse of aquaponics. Hardy, productive, legal in most states. Best all-around beginner fish.

Tilapia Fish Food →

Rainbow Trout

Moderate
Water Temp:50-65°F
pH Range:6.5-7.5
Growth Rate:Medium (9-12 mo)
Best System:Any (cold water)
Flavor:Excellent, rich

Perfect for cold climates. Sensitive to warm water — needs cooling above 68°F. Highly prized eating fish.

Rainbow Trout Fish Food →

Channel Catfish

Easy
Water Temp:70-85°F
pH Range:6.5-8.0
Growth Rate:Medium (12-18 mo)
Best System:Media bed, DWC
Flavor:Mild, meaty

Great tilapia alternative where tilapia is restricted. Very tolerant of lower oxygen levels.

Channel Catfish Fish Food →

Yellow Perch

Moderate
Water Temp:60-75°F
pH Range:7.0-8.0
Growth Rate:Slow (18-24 mo)
Best System:Any
Flavor:Excellent, mild

Commands premium prices at farmers markets. Ideal for northern climates. Grows slower but widely legal.

Yellow Perch Fish Food →

Koi

Easy
Water Temp:60-75°F
pH Range:6.8-7.5
Growth Rate:N/A (ornamental)
Best System:Any
Flavor:Not eaten

Beautiful to look at, widely legal, great nutrient producers. Choose koi if eating fish isn't your goal.

Koi Fish Food →

Goldfish

Easy
Water Temp:60-75°F
pH Range:6.5-7.5
Growth Rate:N/A (ornamental)
Best System:Desktop, small
Flavor:Not eaten

Best fish for beginner desktop kits. Cheap, widely available, easy to care for. Great for kids.

Goldfish Fish Food →

Best Fish Foods — What We Feed Our Systems

Best for: Tilapia, catfish, perch

Purina AquaMax Fingerling Starter

$25-$40

The standard for tilapia and catfish. High protein (45%), sinks slowly so fish find it easily. Pellet size matches fingerling and juvenile fish.

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Best for: Koi, goldfish

Hikari Wheat-Germ Koi Food

$15-$25

Premium koi and goldfish food with natural wheat germ. Easy to digest, minimal waste, and water stays cleaner. Great for ornamental fish systems.

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Best for: Rainbow trout

Rangen Trout Feed

$30-$50

Purpose-formulated for rainbow trout. High protein, sinking pellets, consistent size. The brand recommended by commercial trout farms.

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