I’ve kept freshwater tanks for over 9 years, and I’ve lost count of how many times I’ve debated tank mate pairings with fellow hobbyists. If you’re drawn to the bright, schooling rummy nose tetra and the vibrant, personality-filled cichlid, you’ve almost certainly asked: can rummy nose go with cichlids. It’s not a yes or no question right off the bat, because a lot depends on your tank setup, the specific cichlid species you pick, and how you introduce the fish to each other. I’ve tried this pairing twice before—once with terrible results, once with a tank that’s thrived for 18 months now, so I’m breaking down exactly what you need to know to pull it off successfully.
Can Rummy Nose Go With Cichlids? Short Answer + Key Context
The short answer is yes, but only if you meet very specific criteria. Rummy nose tetras are tiny, peaceful, skittish fish that grow to just 2 inches long at most, and they spend most of their time schooling in the middle and upper parts of the tank. They’re also extremely sensitive to water parameter swings, and they can get stressed out very easily by aggressive tank mates. Cichlids, on the other hand, are an extremely diverse group of fish—some are tiny and mild, others grow over a foot long and will eat any smaller fish that fits in their mouth. Temperament alignment and water parameter matching are the two most important factors here, and if either is off, the pairing will fail.
When I first tried this pairing back in 2020, I made the mistake of picking a juvenile electric yellow cichlid, which I thought was mild. Turns out as it grew, it got more territorial, and it kept nipping at the rummy noses’ fins until half the school died from stress and injury. That mistake taught me that you can’t just pick any pretty cichlid and assume it will work with tiny tetras.
Conditions That Make This Tank Pairing Work
If you want to keep rummy nose and cichlids together successfully, you can’t cut corners on these non-negotiable requirements. Skip even one, and you’ll likely end up with stressed, injured, or dead fish. I’ve tested all of these myself, and they’re the exact rules I followed for my successful 35-gallon mixed tank that’s still running today:
- 30-gallon minimum tank size: Rummy nose tetras need to be kept in groups of at least 6 to feel secure, and cichlids need space to establish small territories without bothering the school. Anything smaller than 30 gallons will leave too little room for both species to avoid each other.
- Non-predatory cichlid species that grow no larger than 4 inches when fully mature. Any cichlid bigger than that will see rummy nose tetras as a quick snack, even if they’re not explicitly aggressive.
- Matching water parameters: Soft to moderately hard water, pH between 6.0 and 7.5, and consistent temperature between 75°F and 80°F. Rummy noses can’t tolerate the high pH and hard water that many African cichlid species need, so you’ll need to stick to cichlids that prefer neutral to slightly acidic water.
- Plenty of hiding spots: Add dense live plants like java fern and anubias, driftwood, and small rock caves to give rummy nose tetras a place to hide if they feel threatened. This also helps cichlids establish their own territories away from the schooling area.
You don’t need a super fancy tank setup to meet these requirements, but you do need to plan ahead before you buy any fish. I’d recommend setting up the tank and cycling it fully for 4 to 6 weeks before adding any fish, to make sure water parameters stay stable right from the start.
Cichlid Species to Pair With Rummy Nose (And Ones to Avoid)
Picking the right cichlid species is 80% of the battle when you’re trying this pairing. I’ve tested a few different options, and talked to dozens of fellow hobbyists to narrow down the safest picks, and the ones you should never add to a tank with rummy nose tetras.
The best cichlid picks for this pairing are all small, mild South American cichlids that share the same water preference as rummy noses. Ram cichlids, especially German blue rams and golden rams, are a top pick—they’re colorful, stay under 3 inches long, and spend most of their time near the bottom of the tank, so they won’t bother the schooling tetras in the middle. Keyhole cichlids are another great option, they’re very shy and non-territorial, and they rarely bother smaller fish. Apistogramma, also called dwarf cichlids, work well too, as long as you don’t keep more than one male of the same species, since they can get territorial with each other during breeding season.
There are a lot of cichlid species you should avoid at all costs, no matter how small they are when you buy them. Aggressive varieties like oscar fish, jack dempseys, red devil cichlids, and most mbuna African cichlids will either eat rummy nose tetras outright, or harass them so much they die of stress. Even larger peaceful cichlids like angelfish can be risky, since they grow up to 6 inches long and have been known to eat small tetras if they get hungry enough.
A friend of mine made the mistake of adding two juvenile angelfish to his 29-gallon rummy nose tank last year. At first they got along fine, but once the angelfish hit 4 inches long, they started picking off the tetras one by one until there were none left. Don’t make that same mistake.
Pro Tips to Maintain Peace in Your Mixed Tank
Once you have the right tank setup and the right cichlid species, there are a few small tricks you can use to keep conflict to a minimum. These are all tips I picked up through trial and error, and they’ve kept my mixed tank completely peaceful for over a year now.
First, add the rummy nose tetras to the tank at least a week before you add any cichlids. This lets the tetras get comfortable in their environment, and it means the cichlids won’t see the entire tank as their territory when they’re introduced. If you add the cichlids first, they’re far more likely to chase and nip at the new tetras to defend their space.
Feed at multiple spots across the tank to prevent food-related conflict. Cichlids can be very greedy when it comes to food, and if you only drop food in one spot, they’ll chase the tetras away to keep all the food for themselves. I drop half the food near the bottom of the tank for the cichlids, and half near the top for the tetras, so both groups get enough to eat without fighting.
You should also do 20% weekly water changes to keep parameters stable, since rummy nose tetras get very stressed if ammonia or nitrite levels spike even a little bit. Cichlids produce a lot more waste than tetras, so regular water changes are non-negotiable to keep both groups healthy. I also test my water parameters every 3 days for the first month after adding new fish, to make sure everything stays consistent.
If you notice any cichlid nipping at the tetras’ fins, or chasing them nonstop for more than a day or two, you should move the cichlid to a different tank. Some individual cichlids just have more aggressive personalities than others, even if they’re a species that’s supposed to be mild. It’s not worth risking the health of your tetra school to keep one aggressive cichlid.
At the end of the day, can rummy nose go with cichlids? It’s absolutely possible, as long as you pick the right cichlid species, meet the basic tank requirements, and take small steps to reduce conflict. You don’t need to be an expert fish keeper to pull this off, but you do need to do your research before you buy any fish, and pay attention to how the fish interact once they’re in the tank. If you follow the rules we’ve laid out here, you’ll end up with a beautiful, active community tank that shows off the best of both rummy nose tetras and cichlids.