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Freshwater Tropical Fish Compatibility

There is no substitute for practical experience with compatibility, but here are a number of ways to gain a starting basis.  The compatibility database at Tim's is set up intentionally to be conservative. If there's a slight chance two types of fish won't get along, we don't list them as compatible.  This could be based on aggression but also on more subtle factors, such as the fact that many tetras get stressed by other fast moving fish even though they aren't being attacked.  It's is a challenging task to create a compatibility database and there are always individuals who have a different experience in their community tanks.  For example, 50% of our readers say that angels and discus are compatible and the others disagree.  So these two don't show as compatible in the database. You only get further clarification by reading our specific info on angels.

The sources of information for creating the database include personal experience, forum postings on our site, emails received from readers and a review of as many internet sites as possible.  We continually accept suggestions for improvement to the table.  Be sure to check the Gallery section in order to get better insight.  If you have information to share, send us your Updates, Suggestions and Photos

1

Search for compatible combinations.  Select a specific fish from this drop down box.  When you hit Submit, a list of compatible fish will be returned.

 

2

Select a specific fish from the first drop down box below and a fish that you want to compare to in the second box.  When you hit Submit, it will tell you whether the two selections are compatible.


 

3

Search Fish Facts for complete information on specific fish, including compatibility.  Each information page has a table which lists compatible fish for the species selected.  To search, click on the search button.

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4

Read about the 11 Categories of compatible species at www.aquariumfish.net.  Highlights are provided below.


Category  Category Members
Link to www.aquariumfish.net for further information about this table
1
Small Tetras, Harlequin Rasboras, White Clouds, Fancy Guppies Corydoras Catfish, Glass Fish, Honey Gouramis and Ghost Shrimp
2
Danios, Mollies, Platies, Swordtails and Larger Tetras
3
Barbs, Gouramis, Sharks, Eels and Loaches
4
New World Cichlids
5
Oscars and Large Plecostomus
6
Mbuna Cichlids
7
Peacock and Haplochromis Cichlids
8
Angelfish, Dwarf Gouramis, Neon Blue Gouramis, Neon Blue Rainbows
9
Tadpoles, Fiddler Crabs, Mystery Snails, Crayfish and Ghost Shrimp
10
Fantails, Black Moors, Red and Calico Telescopes, Red Orandas, Red and White Orandas, Calico Orandas, and Red Cap Orandas
11
Fancy Koi, Red Pond Comets, White Pond Comets, Red and White Pond Comets, and Shubunkins


The compatibility database at Tim's is set up intentionally to be conservative.  If there's a slight chance two types of fish won't get along, we don't list them as compatible.  This could be based on aggression but also on more subtle factors, such as the fact that many tetras get stressed by other fast moving fish even though they aren't being attacked.  It's is a challenging task to create a compatibility database and there are always individuals who have a different experience in their community tanks.  For example, 50% of our readers say that angels and discus are compatible and the others disagree. So these two don't show as compatible in the database.  You only get further clarification by reading our specific info on angels

The sources of information for creating the database include personal experience, forum postings on our site, emails received from readers and a review of as many internet sites as possible.  We continually accept suggestions for improvement to the table.  Be sure to check the Gallery section in order to get better insight.

Comments by lemuelpr from our Forum:

Compatibility. What does it means??? We will never know. Info in this site is about general compatibility, like in any other site. But fish are animals, and like any other animal (even humans) they need space. If you croud a tank fish will get stressed and will start fighting for their space. Plus some fish have their unique behavior. You will read about some crazy things, but the compatibility written here is in general. Remember there are different types of Gouramis, Tetras, Rainbows, etc. So read about your species behavior first before adding him to your tank. But SPACE is always the most important thing. Even Guppies will kill themselves if there's no space. Also very important is the bilogical load of the ecosystem, fish don't only need water but bacteria, oxygen, and water quality. Gouramis, in my experience, like high quality water. So having many fish means more waste and less water quality. Most fish freaks like me what end doing is having more than one tank to have what we want. But be patient.