Overnight shipping required for the safety of all live fish
Free Overnight Shipping on all orders over $200
Quantity
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100% Live Arrival Guarantee
Photo any DOA in the sealed bag on the day of delivery. Approved claims are resolved with store credit, refund, or replacement at Razz Aquatics' discretion. See policy →
Quarantined livestock • Professionally packed • Insulated with weather protection
100+ AquariumsQuarantined Before ShippingFamily-Owned
Care Level
Beginner Friendly
Temperature
73–81°F
pH Range
6.0–7.5
Min. Tank
30 gallons
Congo Tetra$9.99
Species Profile
Congo Tetra
Phenacogrammus interruptus
Why We Love This Fish
Verified shrimp-safe species
Quarantined before shipping
Stunning in planted tanks
Peaceful community fish
Congo Tetras are one of the most visually striking schooling fish in the freshwater hobby. Male iridescent scales shift from gold to blue to violet depending on the angle of light, and males develop extended, flowing fin tips. Native to the Congo River basin in Central Africa, they are larger than typical nano fish at 3 inches and need correspondingly larger aquariums.
Despite their size they are peaceful fish well-suited to larger planted community tanks with soft, slightly acidic water. Every fish we ship is quarantined before departure.
Care Notes
Congo Tetras prefer soft, slightly acidic to neutral water and can be sensitive during the first week after arrival — keep lights dim and avoid sudden parameter changes. Feed a varied diet of quality pellets, flake, and occasional frozen foods. Males may show fin damage in cramped conditions; provide horizontal space.
Keep in groups of at least 8 in a tank large enough to give them horizontal swimming space. Peaceful with most community tank mates. Note: at 3 inches and 30-gallon minimum, Congo Tetras are not true nano fish but are excellent for larger planted community tanks.
Quick Care Facts
Care Level
Beginner Friendly
Temperature
73–81°F
pH Range
6.0–7.5
Min. Tank
30 gallons
Diet
Small pellets, flake food, frozen daphnia, bloodworm
Adult Size
~3 in
What’s Included
Quarantined fish
Insulated + weather pack
Overnight required
Species Spotlight
Why We Love This Fish
01
Iridescence in Motion
A school of Congo Tetras under aquarium lighting shifts through gold, blue, and violet with every turn. One of the most visually arresting schooling fish in freshwater.
02
Peaceful and Sizeable
Large enough to be a centrepiece fish, peaceful enough to live with most community tank mates.
03
Quarantined Before Shipping
Every fish is held and health-checked at our facility before it ships.
Community Tank
Compatible Tank Mates
These nano fish coexist well with shrimp and other peaceful invertebrates.
Keep 8–10 or more in a 30-gallon or larger planted tank with open swimming space and dark substrate. Congo Tetras are not nano fish by size — plan accordingly. Fish ship Overnight / Next Day Air — choose your delivery date at checkout.
Fish ship via Overnight service to minimize stress and maximize live arrival success. Livestock ships Monday through Thursday. Choose your preferred delivery date at checkout.
1
Choose Delivery Date
Select your preferred delivery date at checkout. Livestock delivers Tuesday through Friday.
2
Quarantined & Health Checked
Every animal is imported, quarantined on-site, and health-checked before it ships.
3
Packed for the Weather
Insulated box with heat or cold pack matched to your local weather forecast.
4
Live Arrival Guaranteed
100% Live Arrival Guarantee on every order. Photo any DOA in the sealed bag on the day of delivery and submit a claim through the Start a Claim page. Approved claims are resolved with store credit, refund, or replacement at Razz Aquatics' discretion.See policy →
Fish orders require Overnight. Free Overnight at $200+. Shrimp & livestock: Free 2-Day at $120+.
Why Order From Razz Aquatics
Quarantined Before Every Shipment
Every animal we sell is imported from trusted suppliers, quarantined in our dedicated facility, and health-checked before it ships. We run over 100 aquariums on-site — each focused on a specific species or color morph.
This is a family-owned operation. We pack every order ourselves and stand behind it with a 100% Live Arrival Guarantee. No drop-shipping. No middlemen.
100+
Dedicated quarantine & holding aquariums on-site
48+
States served with live livestock delivery
4.9★
Average customer rating across all verified reviews
100%
Live Arrival Guarantee — backed without fine print
Quarantined Before ShippingFamily-Owned & Operated
Common Questions
Congo Tetra FAQ
Are Congo Tetras safe with shrimp?+
Adult shrimp are generally ignored, but at 3 inches they have larger mouths than nano fish. Shrimplets are at risk. Recommend heavily planted tanks or shrimp-free setups.
How many should I keep?+
8–10 minimum. Small groups show pale colour and nervous behaviour.
How do I acclimate Congo Tetras?+
Float the bag 15 minutes for temperature. Drip-acclimate at 2–3 drops per second for 30–60 minutes. Net the fish into the tank — never add bag water. Dim lights for the first few hours.
How are these fish shipped?+
Via Overnight / UPS Next Day Air. Professionally packed in an insulated box with a heat or cold pack matched to your local weather. Fish ship Monday through Thursday and deliver Tuesday through Friday.
Is there a live arrival guarantee?+
Yes — 100% Live Arrival Guarantee on every order. Photo any DOA in the sealed bag on the day of delivery and submit a claim through the Start a Claim page. Approved claims are resolved with store credit, refund, or replacement at Razz Aquatics’ discretion.
Live plants give nano fish cover, reduce stress, and create a more natural aquarium. They help break up sightlines, provide shelter for shy fish, and support a healthier planted tank.
Shrimp Safe
Shrimp Safe
Shrimp Safe
Shrimp Safe
Shrimp Safe
