What Are Corydoras?

Corydoras catfish, commonly known as cory catfish, belongs to a genus of South American catfish. With over 160 species (and more waiting to be classified), these little fish are named after the bony plates of armor on their bodies.

They’re usually 1 to 3 inches long in aquariums and have sharp spines in their fins for protection against predators (so avoid catching them with bare hands!). You'll notice they may get stuck in any fish nets you're using to catch them.

Some popular varieties include:

• Bronze cory and albino cory (Corydoras aeneus)

• Panda cory (Corydoras panda)

• Gold Green Cory (Corydoras splendens)

• Pygmy cory (Corydoras pygmaeus) – One of the smallest species that loves swimming in the middle of the tank.

Tank Requirements:

• Tank Size: For dwarf species, a 10 gallon aquarium may suffice, but we recommend 20 gallons or more for most other varieties. Safety in numbers is crucial, so keep a group of six or more corydoras of the same species to keep them happy and confident.

• Tank Mates: Cory catfish are peaceful and can coexist with most community fish. Avoid keeping them with large fish like goldfish, which might mistake them for snacks.

• Substrate: Corydoras have wispy barbels (whiskers) to find food, so smooth sand or gravel is preferred. Avoid rough substrates that could damage their delicate barbels and underbodies.

Water Parameters:

• Temperature: Cory catfish thrive in 72° to 82°F. Different species have varying preferences, so research your specific type.

• pH Levels: Aim for a pH range of 6.5 to 7.8.

• Water Change: Change the water regularly, every week or two. Around 20% to 30% of the water should be sufficient. However, the exact frequency may vary depending on your tank size, fish density, plant load, and filtration. 

Behavior and Habits:

• Corydoras are social creatures. They prefer to shoal together, so ensure you have at least six of the same species. 

• They’re most active during the day, with peak activity at dawn and dusk.

• Provide low-lying plants for them to take shelter under. Plants like Java Moss and pearlweed can do nicely. 

• Add decor and other elements that can serve as their hiding spots. These spots help reduce stress and make them feel more secure. 

Diet:

• Cory catfish are omnivorous. Their diet should include both plant and animal matter. You can supplement their diet with live or frozen food. Daphnia, bloodworms, and brine shrimp are popular choices.

• High-quality sinking pellets should be the main part of their diet because they are bottom feeders. Make sure they get their share of the food, so the fish swimming in the tank's upper part don't eat all the pellets.

Remember, these adorable catfish are not only great for cleaning up debris but also add a touch of charm to your aquatic community. Happy fish keeping! 🐟🌿