Why Your Goldfish or Betta Fish Doesn't Deserve the Bowl

And What You Should Do Instead

It’s a classic image: a goldfish swimming lazily in a round glass bowl, or a vibrant betta perched in a tiny decorative vase. But while these setups are common, they’re not safe or healthy homes for fish. In fact, bowls can dramatically shorten your pet’s life.

Let’s break down why bowls are harmful, and how to give your goldfish or betta the long, thriving life they deserve.

The Problem with Bowls

1. Poor Filtration = Toxic Water

Bowls almost never have filtration systems, and fish waste quickly builds up. Ammonia levels rise, stressing your fish and damaging their gills. Even partial water changes won’t keep up with the toxins.

2. Not Enough Space

• Goldfish can grow between 4 and 12 inches and some get over and live for 10–20 years. 

• Depending on the type, they need 20 to 55 gallons for the first fish and 10+ for each after.

• Bettas may be small, but they still need at least 5 gallons to swim, rest, and explore.

3. Lack of Oxygen

Bowls have a small surface area, which means less oxygen exchange. Without an air stone or filtration current, fish can struggle to breathe, especially goldfish, which produce a lot of waste.

4. No Temperature Control

Bettas are tropical fish and need stable water temps between 76–82°F. Without a heater, they become sluggish, sick, or stressed. Bowls don’t support heaters or thermostats well.

5. Stress and Boredom

A cramped, bare bowl offers no enrichment. Fish can’t exhibit natural behaviors like exploring, hiding, or foraging, leading to boredom, fin rot, or even self-injury.

What to Do Instead

For Goldfish:

• Minimum tank size: 20-30 gallons

  • For fancy, double tailed goldfish: 20-30 gallons for the first, 10-20gal for each after

  • For common, single tailed goldfish: 55-75 gallons for the first, 20-30gal for each after

• Essentials: strong filtration, weekly water changes, a test kit, gravel vacuum

• Tip: Fancy goldfish (like orandas) are slower swimmers and better suited to tanks than ponds.

For Bettas:

• Minimum tank size: 5 gallons

• Essentials: heater, gentle filter, plants (real or silk), hiding spots

• Tip: Bettas enjoy calm water and get stressed with strong currents — pick a sponge filter or low-flow filter.

What You Should Track for Healthy Fish

To keep your aquarium environment safe, stable, and healthy, it’s important to monitor key water parameters regularly, especially after water changes or adding new fish.

Here’s what to track:

Parameter	Ideal Range for Goldfish	Ideal Range for Bettas
Ammonia	0 ppm	0 ppm
Nitrites	0 ppm	0 ppm
Nitrates	< 40 ppm	< 20–40 ppm
pH	6.5–7.5	6.5–7.5
Temperature	65–75°F (18–24°C)	76–82°F (24–28°C)

These values can vary slightly by breed and setup, but staying within these ranges helps prevent disease and stress.

Give Your Fish the Life They Deserve

Fish are often seen as “starter pets,” but they deserve the same thoughtful care as any animal. A proper setup not only extends their lives but lets you see their real personalities, goldfish that play and beg for food, or bettas that explore their tank and build bubble nests.

By upgrading from a bowl to a proper tank and staying on top of water quality, you're giving your fish a chance to thrive, not just survive.

Use Every Wag to Stay on Track

Monitoring water quality doesn’t have to be complicated. With the Every Wag app, you can:

• Track water temperature, ammonia, nitrate, and pH levels

• Set reminders for water changes and filter cleanings

• Log behavior or appearance changes

• Most importantly, catch potential issues before they become emergencies

Even small fluctuations in water quality can have big effects on fish, especially in smaller tanks. Logging your readings makes it easier to spot patterns and keep your fish safe.