Best Tank Mates for Severums

Severums (Heros sp.) are some of the most rewarding South American cichlids you can keep. They are large, peaceful for their size, and full of personality, which makes them a favorite for community-minded cichlid keepers. But "peaceful for a cichlid" still means thoughtful stocking. Choosing the right tank mates keeps your Severum calm, reduces aggression, and helps everyone thrive. Below is a practical guide to the best companions, the ones that work with caution, and the fish you should avoid.

What Makes a Good Severum Tank Mate?

Severums grow to roughly 8 to 12 inches and are generally easygoing, but they are still cichlids with a sense of territory, especially when breeding. The best tank mates are sturdy fish that are too large to be swallowed, calm enough not to provoke fights, and comfortable in the same warm, soft-to-moderately-hard water. A spacious tank with strong filtration is the single biggest factor in keeping everyone peaceful, so plan for a large aquarium and plenty of cover. If you are new to cichlids, our best cichlids for beginners guide and our Oscar fish care guide are helpful background reading on cichlid temperament.

Best Severum Tank Mates

These companions are large enough to coexist, share similar water needs, and rarely cause trouble in a properly sized tank.

Other Severums

A group of Severums can live together beautifully in a big tank, and a bonded pair is a joy to watch. Mixing color varieties like Gold Severums, Green Severums, and Turquoise Severums creates a stunning display, provided you give them room to establish territories.

Geophagus (Eartheaters)

Eartheaters are a near-perfect match. They are peaceful, occupy the lower water column sifting sand, and enjoy the same conditions. Hardy choices include the Red Head Tapajos Geophagus and the sand-sifting Geophagus sveni. Browse the full South American cichlids collection for more options.

Large Plecos

Sturdy plecos make excellent bottom-dwelling companions and help keep algae in check. Calico Bristlenose Plecos and Snow White Bristlenose Plecos are great, low-fuss options, and larger species work well too. See our pleco care guide and the plecos collection for choosing the right one.

Catfish (Synodontis and Pictus)

Mid-sized catfish add activity and useful clean-up duty. The Featherfin Synodontis and the schooling Spotted Pictus Catfish are both hardy and Severum-safe at the right size. Our Pictus catfish care guide covers their needs, and you can explore more in the catfish and bottom dwellers collection.

Blood Parrot Cichlids

Blood Parrot cichlids share the Severum's gentle disposition and similar size, making them a popular pairing. Learn more in our parrot cichlid care guide.

Silver Dollars

Silver Dollars are fast, peaceful, schooling fish that match a Severum's size and add motion to the upper tank. Keep them in a group of six or more so they feel secure. (We do not currently stock these as a live fish online, but they are a classic Severum companion.)

Tank Mates That Work With Caution

These fish can succeed with Severums, but compatibility depends heavily on tank size, individual temperament, and not adding them during breeding periods.

• Firemouth cichlids – generally mellow but will defend a chosen territory.
• Jack Dempsey cichlids – can work in a large tank, but they are more aggressive than a Severum.
• Green Terrors and other medium South/Central American cichlids – possible with heavy planning and lots of space.
• Convict cichlids – small but feisty; aggression spikes when breeding.

For multi-cichlid setups, our 75-gallon cichlid tank setup guide walks through the space and filtration you will need.

Tank Mates to Avoid

Skip anything small enough to be eaten or too delicate to handle a cichlid's presence. Avoid small tetras, guppies, rasboras, shrimp, snails, and tiny loaches, all of which a full-grown Severum may treat as a snack. Also steer clear of highly aggressive fish like large Mbuna or red devils that will bully a peaceful Severum. For peaceful nano stocking instead, see our community fish collection and community tank food guide.

Stocking Tips for a Peaceful Severum Tank

Give your Severum the biggest tank you can, aim for plenty of footprint rather than height, a 125-gallon build gives a Severum community room to thrive, for an even larger build, see our 180-gallon stocking guide, and add tank mates of similar or slightly smaller robust size all at once when possible. Provide caves, driftwood, and sightline breaks to diffuse aggression, and keep water stable with strong filtration. Review our aquarium filtration guide and make sure the tank is fully established using our nitrogen cycle guide before adding fish.

Frequently Asked Questions

Are Severums aggressive?

Severums are among the more peaceful large South American cichlids. They can become territorial when breeding or in cramped quarters, but in a spacious, well-decorated tank they are generally calm community-capable cichlids.

Can Severums live with Angelfish?

It is possible in a large, tall tank since both are South American cichlids with similar care, but watch for fin-nipping and territorial disputes. Our best tank mates for Angelfish guide explains Angelfish compatibility in more detail.

How big of a tank do Severums need?

A single Severum needs at least a 55-gallon tank, and a community or pair setup should be 75 gallons or larger. More space means less aggression and healthier fish overall.