Guppy fish swimming in a small indoor aquaponics tank

Best Fish for Small Indoor Aquaponics Systems

🐟 Best Fish for Indoor Aquaponics – Top Picks for Beginners

Want to grow herbs indoors and raise fish at the same time? Indoor aquaponics lets you do both in one sustainable, eco-friendly system. But choosing the best fish for indoor aquaponics makes all the difference in a thriving setup.

In this guide, we’ll help you pick the right species for your tank, whether you’re starting small or going bigger over time.


📦 What You Need Before Choosing Fish

Before adding any fish, make sure your indoor aquaponics tank is set up with:

  • Proper filtration and water cycling
  • A water heater (if needed by species)
  • Safe materials and adequate space
  • Plants that thrive with high nutrient loads

For setup help, check out our small aquaponics tank guide.


🐠 Top Fish for Indoor Aquaponics

🧡 1. Goldfish

Goldfish are the best fish for indoor aquaponics if you want something simple, hardy, and mess-friendly. They’re low-cost, tolerant of beginner mistakes, and don’t need heated water.

💙 2. Guppies

Guppies are perfect for small tanks. They’re colorful, fun to watch, and thrive in planted tanks. They’re peaceful and ideal for herb gardens like basil and lettuce.

💛 3. Tilapia

Tilapia grow quickly and are great if you want to eventually eat the fish. They’re a common commercial aquaponics fish but require warm water (above 75°F) and bigger tanks.

❤️ 4. Bettas

Bettas are solitary and perfect for small setups. One betta can live comfortably in a 5-gallon aquaponics system with gentle plants and low-flow water movement.


🔁 Match Fish With Plants

For balance, match high-waste fish like goldfish with nutrient-hungry plants like:

  • Spinach
  • Kale
  • Swiss chard

🌐 More Info

Looking to learn more? Here’s a reputable guide on choosing aquaponics fish from The Aquaponic Source.


🧠 Final Thoughts

Choosing the best fish for indoor aquaponics sets the tone for your success. For beginners, goldfish and guppies are safe bets. As your tank grows, try tilapia or experiment with other hardy species.

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