What Fish Can Be With Cichlids – The Ultimate Compatibility Guide For
Keeping cichlids is one of the most rewarding experiences you can have in the aquarium hobby, but I know how stressful it feels to pick their roommates.
You want a vibrant, active tank, but you also don’t want to wake up to a “fish-room brawl” or, worse, a missing inhabitant.
Deciding what fish can be with cichlids is the key to a peaceful underwater world, and today, I’m going to walk you through the exact combinations that work, so you can build your dream setup with total confidence.
Understanding the Cichlid Personality: Why Compatibility is Tricky
Before we dive into specific species, we need to address the “elephant in the room”—or rather, the cichlid in the tank. Cichlids are famous for their intelligence, parental instincts, and, unfortunately, their territorial aggression.
In the wild, these fish have evolved to defend their patch of rock or sand against any interloper. This isn’t because they are “mean,” but because they are protecting their food source and their future offspring.
When we bring them into our homes, that instinct doesn’t go away. To successfully choose tank mates, we have to understand that compatibility isn’t just about size; it’s about water chemistry and behavioral boundaries.
The Great Divide: African vs. American Cichlids
The most common mistake I see beginners make is mixing African and South American cichlids. This is a recipe for disaster because they come from entirely different environments.
African cichlids (from Lake Malawi, Tanganyika, or Victoria) thrive in hard, alkaline water with a high pH. South and Central American cichlids generally prefer softer, more acidic water.
If you try to find what fish can be with cichlids without checking their origin, you’re setting yourself up for a struggle with fish health and stress levels.
Determining what fish can be with cichlids based on water chemistry
To make this easy, we have to look at the two main “camps” of cichlids separately. Your choice of tank mates will depend entirely on which type of water your aquarium supports.
If your tap water is naturally hard, you’ll likely find success with African species. If it’s soft, the world of Angelfish, Rams, and Oscars is open to you.
The Role of Water Parameters in Compatibility
Mixing fish that require different pH levels leads to osmotic stress. This weakens the fish’s immune system, making them susceptible to diseases like Ich or Hole-in-the-Head.
Always aim for tank mates that share the same temperature, pH, and water hardness requirements. This is the foundation of a long-lasting, healthy community.
Don’t worry—this setup is perfect for beginners! Once you match the environment, the behavioral part becomes much easier to manage.
Best Tank Mates for African Cichlids (Lake Malawi & Tanganyika)
African cichlids are perhaps the most colorful freshwater fish on the planet, but they are also some of the most aggressive. Finding what fish can be with cichlids from the Rift Lakes requires choosing fish that are fast, tough, or “invisible” to them.
1. Synodontis Catfish
These are my absolute favorite bottom-dwellers for African tanks. Specifically, the Synodontis multipunctatus (Cuckoo Catfish) and Synodontis lucipinnis are fantastic.
They are armored, quick, and possess a “don’t mess with me” attitude that even the grumpiest Mbuna respects. Plus, they do a great job of cleaning up leftover food.
2. Giant Danios
If you have a large enough tank, Giant Danios are excellent “dither fish.” They are incredibly fast and tend to stay in the upper layers of the water column.
Their constant movement helps distribute the aggression of the cichlids. Because they are so fast, the cichlids usually give up the chase quickly.
3. Rainbowfish
While not from Africa, certain Rainbowfish (like the Bosemani or Turquoise Rainbows) can handle the hard water and high pH.
They are large enough not to be eaten and fast enough to stay out of trouble. Their shimmering colors also complement the neon blues and yellows of the cichlids beautifully.
Best Tank Mates for South and Central American Cichlids
South American cichlids range from the peaceful Discus to the massive, “puppy-dog” Oscar. Because their temperaments vary so much, we have to be more specific here.
1. Silver Dollars
If you are keeping large Central American cichlids like Oscars or Jack Dempseys, Silver Dollars are the gold standard for tank mates.
They are deep-bodied and fast, making them difficult for a cichlid to swallow or catch. They are schooling fish, so keep them in groups of five or more to see them thrive.
2. Bristlenose Plecos
Almost every South American cichlid tank can benefit from a Bristlenose Pleco. Unlike the common pleco, they stay a manageable size (around 5 inches).
Their tough, bony plates act as armor. Most cichlids will leave them alone after one or two unsuccessful pokes at their spiny exterior.
3. Larger Tetras (Buenos Aires or Colombian Tetras)
If you are keeping “dwarf” cichlids like German Blue Rams or Apistogrammas, you can keep smaller fish. However, for medium-sized cichlids, you need “tough” tetras.
Buenos Aires Tetras are notoriously hardy and can hold their own. Avoid thin-bodied fish like Neon Tetras, as they will quickly become an expensive snack.
The Concept of “Dither Fish” and Why You Need Them
You might be wondering what fish can be with cichlids to actually reduce aggression. This is where “dither fish” come into play.
Dither fish are active, schooling fish that swim in the open water. Their presence signals to the cichlids that there are no predators nearby.
How Dithers Change the Tank Dynamic
When cichlids see other fish swimming calmly in the open, they feel safe enough to come out of hiding. This reduces their stress and makes them less likely to lash out at their neighbors.
Good dither fish include Tiger Barbs, Silver Tip Tetras, or Giant Danios. They provide a “visual distraction” that keeps the tank’s energy balanced.
The Importance of Tank Size and “Breaking Sightlines”
Even the most compatible fish will fight if they are cramped. When considering what fish can be with cichlids, the size of your aquarium is your most important tool.
A 55-gallon tank is generally the bare minimum for most cichlid communities. Larger tanks allow you to create distinct territories using rocks, driftwood, and caves.
Using Hardscape to Manage Behavior
I always recommend using “visual breaks.” If a dominant fish can’t see its neighbor, it’s less likely to attack.
Stack rocks to the top of the water line for African cichlids, or use large pieces of spider wood for South American species. This creates a complex environment where every fish has a “home base.”
Common Mistakes: Fish to Avoid at All Costs
When people ask me what fish can be with cichlids, I often start by telling them what not to buy. Some combinations are just asking for trouble.
1. Goldfish
This is a hard no. Goldfish are cold-water fish, while cichlids are tropical. Furthermore, goldfish are slow and produce a massive amount of waste, which can lead to ammonia spikes that will kill your cichlids.
2. Small Shrimp and Snails
Unless you are feeding your cichlids a very expensive gourmet meal, keep your shrimp in a separate tank. Almost all cichlids are natural predators of crustaceans.
3. Slow-Moving, Long-Finned Fish
Avoid Fancy Guppies or Bettas. Cichlids are notorious “fin nippers.” A slow fish with flowing fins is an irresistible target for a bored or territorial cichlid.
Step-by-Step: How to Introduce New Tank Mates
Even if you’ve picked the perfect species, how you introduce them matters. If you just drop a new fish into an established cichlid’s territory, it will likely be attacked immediately.
The “Rearrange and Release” Method
- Rearrange the Decor: Before adding new fish, move your rocks and plants around. This “resets” the territories, making every fish feel like they are in a new environment.
- Feed the Tank: Feed your current fish right before the introduction. A full fish is a lazier, less aggressive fish.
- Lights Out: Keep the aquarium lights off for several hours after adding the new arrivals. This helps everyone settle down in a calm environment.
Frequently Asked Questions About Cichlid Compatibility
Can Angelfish live with other cichlids?
Yes, but only with peaceful species. Angelfish are actually cichlids themselves! They do well with Corydoras, Rummy Nose Tetras, and Dwarf Cichlids. Avoid keeping them with aggressive Africans or large Central Americans.
Will my cichlid eat my Pleco?
Usually, no. Most cichlids respect the armor of a Pleco. However, ensure the Pleco is at least the same size as the cichlid’s head to avoid any “choking” accidents if the cichlid tries to get aggressive.
How many fish can I put in a cichlid tank?
For African cichlids, “controlled overstocking” is actually a common tactic to spread aggression. However, this requires heavy filtration and frequent water changes. For South Americans, it’s better to stick to standard stocking levels.
Can I keep Corydoras with African Cichlids?
I would advise against it. Corydoras prefer softer water and are too peaceful for the high-energy environment of a Rift Lake tank. Stick with Synodontis species for African setups.
Conclusion: Building Your Successful Cichlid Community
Finding what fish can be with cichlids doesn’t have to be a guessing game. By respecting the natural origins of your fish and providing plenty of space, you can create a stunning and peaceful display.
Remember, the “golden rule” of cichlid keeping is observation. Every fish has its own personality, and what works in one tank might not work in another.
Stay patient, keep up with your water changes, and don’t be afraid to adjust your layout if you notice someone getting bullied.
With the right tank mates—like Synodontis cats, Silver Dollars, or hardy Rainbowfish—you’ll have a thriving, colorful aquarium that you can be proud of for years to come. Happy fish keeping!
