Pimelodus blochii (Bloch’s Catfish) for Sale in Canada

Pimelodus blochii, commonly known as Bloch’s Catfish, is a hardy, active freshwater catfish that suits Canadian aquarists looking for a characterful bottom-dweller with real personality. If you want to buy aquarium fish online in Canada with confidence, this species is a standout choice: it adapts well to a range of water conditions, feeds eagerly, and grows to an impressive but manageable size. At Canadian Aquarist, we supply healthy, tank-raised and quarantined Bloch’s Catfish ready for live aquarium fish delivery across the country. This guide covers everything you need to know before adding Pimelodus blochii to your setup.

Why Bloch’s Catfish Makes a Great Addition

Bloch’s Catfish is a species of long-whiskered catfish native to slow-moving rivers and floodplains across much of South America, including the Amazon and Orinoco basins. It belongs to the family Pimelodidae, a group aquarists know well for active, hardy, and often strikingly patterned fish.

Unlike many shy nocturnal catfish that hide all day, Pimelodus blochii is bold and visible. It swims in open water, patrols the substrate, and responds quickly to food, which makes it a rewarding centrepiece for larger community and semi-aggressive tanks.

Its appeal comes down to three practical strengths: adaptability to varied water parameters, an unfussy appetite, and a robust constitution that tolerates the minor fluctuations common in home aquariums. For aquarists who want a catfish that actually shows itself, it is hard to beat.

Appearance and Behaviour

Bloch’s Catfish has a smooth, silvery-grey body marked with dark spots and a characteristic stripe running along the lateral line toward the tail. It features a large head, a wide mouth, and long, sensitive barbels used to detect food in the substrate.

These fish are active swimmers, especially at dusk and during feeding. They are generally peaceful toward tankmates too large to swallow, though they will eat small fish and invertebrates that fit in their mouths. Keep that in mind when choosing companions.

Size and Lifespan

Expect Pimelodus blochii to reach roughly 20 to 30 centimetres in length in captivity, with some specimens growing larger. They are long-lived catfish, and with good care many individuals live well over a decade, so plan for a long-term commitment.

Tank Requirements for Pimelodus blochii

A mature tank is essential. The table below summarises the core parameters to help you set up correctly the first time.

Parameter	Recommended Range
Minimum tank size	200 litres (adults)
Temperature	22–26 °C
pH	6.0–7.5
Water hardness	Soft to moderately hard
Substrate	Fine sand or smooth gravel
Lighting	Dim to moderate
Filtration	High-capacity, well-oxygenated

Provide plenty of hiding places using driftwood, caves, and PVC pipes, but also leave open swimming space. Because these catfish are strong and active, secure the lid firmly; they are capable of jumping.

Water Quality and Filtration

Bloch’s Catfish produces a substantial bioload, so robust filtration is not optional. A large canister filter or well-maintained sump keeps ammonia and nitrite at zero and nitrate low. Weekly partial water changes of around 25 percent keep conditions stable and reduce the risk of disease.

Tankmates and Compatibility

Good tankmates include medium to large South American cichlids, silver dollars, large characins, and robust bottom-dwellers such as plecos. Avoid very small fish, shrimp, and fry that will be treated as food. Keep them singly or in groups, but note that groups need more space to reduce territorial squabbles.

Feeding Your Bloch’s Catfish

Pimelodus blochii is an opportunistic omnivore. In the wild it eats insects, crustaceans, small fish, and plant matter, so variety keeps it healthy and colourful.

Offer a staple sinking carnivore pellet as the base diet, then supplement with frozen or live foods such as bloodworm, prawn, mussel, and earthworm. Because the fish feeds mostly at night or in low light, feed shortly before lights-out so it gets its share before other fish clear the tank.

Remove uneaten food promptly to protect water quality. Overfeeding is one of the most common mistakes with large catfish and quickly fouls the water.

Buying Bloch’s Catfish Online in Canada

Shopping for freshwater aquarium fish online should feel as safe and straightforward as visiting a local store. Here is how to buy with confidence.

• Check health indicators. Look for clear eyes, intact barbels, smooth fins, and active swimming behaviour. Avoid fish with clamped fins, cloudy eyes, or visible lesions.
• Confirm sourcing and quarantine. Reputable sellers quarantine new arrivals before sale. Ask about their process if it is not stated.
• Review shipping and delivery. Live tropical fish delivery requires insulated packaging, heat or cold packs as needed, and overnight or express courier options suited to Canadian weather.
• Understand the guarantee. A live-arrival guarantee protects your investment and signals a seller who stands behind their stock.

At Canadian Aquarist, every Bloch’s Catfish is conditioned and health-checked before dispatch, and we ship nationwide with insulation and temperature control appropriate to the season. Whether you are in Ontario, the Prairies, or the Maritimes, you can order online and receive a well-packed, healthy fish.

Pricing and Value in Canada

Pet fish price in Canada varies with size, source, and rarity. Bloch’s Catfish is generally an affordable medium-sized catfish, though larger, show-quality specimens command more. Buying from a specialist who imports and quarantines responsibly usually costs a little more up front but saves money in the long run by reducing losses and vet-like stress on your tank.

For retailers and serious hobbyists, aquarium fish wholesale options in Canada make it easier to stock quality livestock in quantity.

Acclimation Tips for a Smooth Arrival

Proper acclimation reduces shock after transport. Follow these steps on arrival:

1. Float the sealed bag in your aquarium for 15 to 20 minutes to equalise temperature.
2. Gradually add small amounts of tank water to the bag over 30 to 45 minutes.
3. Net the fish into the tank rather than pouring bag water in, to avoid introducing contaminants.
4. Leave lights off for the first few hours and offer food the following day.

Care and Long-Term Health

Bloch’s Catfish are resilient, but they still benefit from consistent care. Keep the tank clean, avoid overcrowding, and maintain stable temperature and pH. Quarantine new tankmates before adding them to prevent introducing parasites or disease.

Watch for common issues such as fin damage from aggressive tankmates, fungal infections on damaged barbels, and stress-related colour loss. Most problems trace back to poor water quality, so test regularly and act early.

If you are expanding a community setup or starting a larger South American biotope, browse our full range of live freshwater fish for sale in Canada to find compatible species.

Frequently Asked Questions

Is Pimelodus blochii suitable for beginners?

It can suit committed beginners with a large, well-established tank. It is hardy and unfussy, but its size, appetite, and bioload demand good filtration and routine maintenance.

How big does Bloch’s Catfish get?

Most reach 20 to 30 centimetres in captivity, with some growing larger. Plan for a tank of at least 200 litres for a single adult.

Can I keep Bloch’s Catfish with small fish?

It will eat any fish or invertebrate that fits in its mouth. Choose tankmates that are too large to swallow.

Do you ship live catfish across Canada?

Yes. We offer aquarium fish delivery nationwide using insulated, temperature-controlled packaging designed for Canadian conditions, with a live-arrival guarantee.

What should I feed my Bloch’s Catfish?

A sinking carnivore pellet as a staple, supplemented with frozen or live foods such as bloodworm, prawn, and earthworm, fed mainly at dusk.

Are Bloch’s Catfish nocturnal?

They are most active at dusk and night but often swim in the open during the day once settled, especially at feeding time.