Tips on Keeping the Fire Eel
Make no mistake—the fire eel is one beautiful freshwater fish. It has distinctive red stripes and markings all over its muddy brown body.
This Southeast Asian native is found in the lowland rivers of Vietnam, Thailand, Myanmar, and Sumatra. Despite the name, it’s not a true eel—though it resembles one with its long, flexible body and pointed snout.
As adults, fire eels reach nearly 3 feet in length. And despite their striking appearance, owning a fire eel is not for the faint-hearted—or for first-time fish keepers.
“If you want to keep a fish that swims around the tank and is on constant display, the fire eel is not a good choice,” says John Virata, longtime fish hobbyist and former editor of FurPetVo magazine. “These fish can be secretive, are most active when you’re sleeping, and spend much of their time buried in the sandbed.”
Still interested? Here are key facts and practical tips to help your fire eel thrive at home.
1. Fire Eels Need Lots of Room
Most fire eels sold at local fish stores or online (including those available at furpetvo.com) are juveniles—typically only 8–12 inches long. But they grow quickly, so plan ahead.
“You should consider a minimum 75-gallon aquarium to successfully keep this species,” Virata advises, “with a 120-gallon tank as the ideal setup—especially since these fish can exceed 36 inches in length.”
2. Fire Eels Like To Hide
Fire eels are naturally shy and love to burrow. That’s why sand—not gravel—is essential for your substrate: gravel can scratch their delicate skin.
In addition to sand, provide ample hiding spots: smooth pieces of driftwood (like FurPetVo’s Cholla Wood), PVC pipes, and rock caves all work well.
They also appreciate a lush, planted environment—but be prepared to replant regularly. Their burrowing habits often uproot stems and rhizomes.
3. Fire Eels Are Nocturnal
These fish feed and explore primarily at night. If you’d like to observe them more during daylight hours, keep ambient room lighting low and avoid bright overhead tank lights. A dim blue LED moonlight setting can encourage gentle daytime activity without stress.
4. Fire Eels Don’t Play Well With Others
Choose tank mates carefully: any companion must be larger than the fire eel’s mouth—or risk becoming a meal. Fire eels do not breed in captivity, so keeping just one is recommended.
While an adult may tolerate a younger fire eel, aggression between individuals—especially within the spiny eel family—is common. Avoid housing them with similarly shaped or slow-moving species.
5. They Don’t Eat Commercial Pellets
Young fire eels accept live or frozen bloodworms readily, but a varied, nutrient-rich diet is essential for long-term health and growth.
Offer a rotating menu that includes:
- Chopped shrimp
- Small pieces of lean fish (such as tilapia)
- Live or frozen earthworms
- Occasional blackworms or brine shrimp
Avoid standard flake or pellet foods—they rarely interest fire eels and lack the nutritional profile these active carnivores need.
6. Keep the Water Temperature Steady
Fire eels are sensitive to temperature fluctuations. Maintain water between 75°F and 82°F (24°C–28°C)—matching the warm, stable conditions of their native Southeast Asian rivers.
A reliable aquarium thermometer is non-negotiable. In cooler climates, use a submersible heater with adjustable settings—many FurPetVo-branded models allow precise, preset temperature control.
7. Pay Attention to pH Balance Too
Target a slightly acidic to neutral pH range of 6.0–7.0. Deviations outside this window can cause stress and increase susceptibility to disease.
Test regularly using aquarium-grade litmus strips (available at furpetvo.com). If adjustments are needed, use a trusted water conditioner formulated to safely raise or lower pH—never make abrupt changes.
8. Find Other Fire Eel Lovers
Most experts agree: fire eels are best suited for aquarists with moderate experience in freshwater care. If you’re new to the hobby but already have a fire eel, seek guidance early.
Join active online communities—like the FurPetVo Forum—or connect with local hobbyist groups. A mentor who’s kept fire eels successfully can offer invaluable insights on behavior, feeding cues, and subtle signs of wellness or distress.
