Understanding Community Fish: Perfect Choices for Your 20-Gallon Aquarium

Community Fish, Orange Fish in an Aquarium // Healthier Pets Today

What is community fish? Keep reading! If you are trying to set up a colorful yet peaceful 20, community fish are the way to go. These fish coexist harmoniously with their tank mates and are suitable for both beginners and experienced aquarists. In this guide, you can find out what community fish are, the advantages of having them, and a list of species that fit the category!

What are Community Fish?

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Community fish can live in harmony with other species in an aquarium. They are not aggressive. They are generally good at adjusting to different tank environments and do not infringe on the territories of other fish. If you are a beginner, start with some community fish.

These fish like to maintain groups, which also helps keep your tank environment alive. If you choose this species, you can have a beautifully balanced display without stress! 

The Advantages of Keeping Community Fish

There are many advantages; here are a few:

  • Community fish can generate a lively and energetic aquarium environment. 
  • They can also tolerate a wide range of species in one tank.
  • Community fish also require less attention, making it great for beginners looking to get their feet wet.
  • Having multiple species of fish in the tank can contribute to the ecosystem because each species will perform a different role in cleaning the tank and maintaining the environment. 

In summary, community fish provide variety, low maintenance, and peace in your aquarium.

Top Community Fish for Beginners

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Community fish is an excellent option if you’re new to fishkeeping

5 Community fish:

  1. Guppies are among the most popular fish since they are hardy and come in many colors. 
  2. Platies are good, and they are very peaceful fish. 
  3. Another great pick Is the zebra danio, a lively fish that is easy to care for.
  4. Neon Tetra are small and colorful and look even better in large schools.
  5. Corydoras catfish are bottom feeders that will help keep your tank clean. 

All these species are docile and make good tankmates for novices. They will be a great addition to your 20-gallon aquarium.

How to Choose Compatible Fish

When selecting fish for your 20-gallon aquarium, consider their size, personality, and care needs. Begin by researching the adult size of the fish you want. Secondly, have a look at the temperament of the species. You would want to avoid pairing aggressive fish.

If you want fish to thrive together, the following should match:

  • Care levels
  • Water temperature
  • pH level
  • Type of foods

Selecting fish that can cohabitate with one another will allow you to create a peaceful and attractive underwater neighborhood.

Tips on Setting Up the Tank

Setting up a 20-gallon tank for community fish is relatively easy with some guidelines. Make sure it sits on a solid 20 gallon aquarium stand. Fit a high-quality filter to maintain crystal clear water, and heat the water if necessary to keep it at the correct temperature.

Use aquarium gravel or sand for the substrate, providing hiding spots and decorating the tank with live or artificial plants. Afterward, fill the tank with dechlorinated water and leave it cycling for a few weeks to increase the good bacteria. Now, slowly add your fish to keep your tank’s ecosystem manageable. There you have it, it’s that easy!

Feeding Guidelines

Feeding fish is very important for their health.  Feed your fish a good-quality flake or pellet for community fish. Occasional treats such as brine shrimp or bloodworms also help to diversify their nutritional intake. Do not overfeed. Feed them what they can consume in a few minutes to prevent water pollution.

Caring for Your Fish Population Healthy

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Being in charge of a fish community is always challenging and often requires much attention. Here is how to care for them. First, you do weekly water tests to ensure all of the parameters are suitable for your fish. For example, nitrites, ammonia, and nitrates should all be at zero or near zero.

Clean this tank by removing leftover foods and debris from the substrate. Also, please look for any signs of stress, illness, or other changes in their swimming behavior and appearance. Vigilance is important!


How many fish can I keep in a 20-gallon tank? 

The general rule of thumb is an inch of fish per gallon of water. However, the ratio for each species could be different. The goal is to create a pleasant and healthy environment with 10-15 small—to medium-sized community fish.

How Do You Clean A 20-gallon Tank? How many times?

To maintain clean and detoxified water, clean weekly. Be sure to clean the substrate (sand) and the decorations every month, and keep the filter clean by examining it frequently.

A 20-gallon tank can allow tropical fish and cold-water fish to be together

Cold-water and tropical fish cannot be kept together because most cool-water fish require warmer temperatures and will not last under the same conditions as tropical fish. Transferring species between cages is never ideal or straightforward, and keeping species that require the same care is best.

What do you do if your fish gets sick?

If your fish are sick, they should always be placed within a quarantine tank to ensure the disease doesn’t spread. To combat the bacterium in your anemone tank, check your water parameters and treat your tank with the appropriate medication. If the symptoms last a long time, consult with a veterinarian.


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Now that you understand community fish better, you can get started! These fish are great if you are just starting or want vibrant fish in your tank. It is as easy as setting up your tank, choosing compatible fish, following feeding guidelines, and cleaning. We have provided you with everything you would need. Enjoy this hobby by starting off right!


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