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Corydoras are the most common bottom dwellers that aquarists prefer to add to their community tank. They are peaceful and hardy fish, making them the perfect choice for beginners. However, as they are bottom dwellers fish, providing them with their ideal substrate requirements becomes essential. So, let us discuss the best substrate for corydoras. Sand is the best substrate for corydoras as they are soft, and corydoras can easily dig into them in search of food. They are bottom dwellers that spend most of their time scavenging on the bottom for food. Use good quality sand for their tank to create at least a 2-inch base on the bottom. This article will discuss the best substrate for corydoras and what other things they need in their tank to live comfortably. So, let us get into it. What's the best substrate for corydoras? The best substrate for your corydoras is sand. Corydoras are bottom-dweller fish and require a soft substrate to dig into and feed from the bottom. If you keep your cory catfish in a rough and hard substrate like stones, they will end up harming themselves. Corydoras will harm their skins and barbels by trying to dig into the substrate and sucking the food from the mouth. They will be unable to sift the substrate and get injured and stressed out. So, consider keeping your cory catfish in a soft substrate like sand to ensure that they easily dig into them and feed. Also, it will help you mimic their natural habitat as in natural habitat; they live in a river that has a sandy bottom. Make at least a 2-inch base on the bottom of the tank using a sand for your corydoras. Make sure to clean the substrate weekly by performing a water change and using a gravel siphon to siphon out the waste. Many aquarists rely on their cory catfish to clean the bottom by feeding on every waste. But, cory catfish will not be able to feed on every waste, and living in the dirty substrate will make them prone to diseases and parasites. Also read: Are Cory Catfish Bottom Feeders? Is gravel ok for cory catfish? Gravel is not a good option to keep as a substrate in your cory catfish tank. Cory catfish are bottom dwellers fish that spend most of their scavenging on the bottom of the tank searching for food. You need a substrate on which your cory catfish can easily dig into and suck up the food. Digging into gravel will result in cory catfish harming their barbels and mouth. They use their barbels to navigate the food, dig into the substrate with their mouth, and suck up the food. Using any rough substrate will bruise their skin, and they may lose their barbels. So, we don't recommend using any rough substrate like gravel in your cory catfish tank as it can harm their body and cause serious health issues. Do corydoras like gravel or sand? Sand is the best substrate for your cory catfish. Corydoras are bottom dwellers and spend most of their time scavenging on the bottom, searching for food. They use their delicate barbels to search for the food in the bottom and use their mouth to dig in and suck the food. If you place hard substrate like big stones or others, your cory catfish will hurt themselves from that by trying to dig into it. Cory catfish live among rivers with a sandy bottom in their natural habitat. Consider using soft sand as a substrate for your cory catfish tank. What other things do corydoras require in their tank? These are some essential things you should consider adding to your cory catfish tank: A heaterA good filter with biofilter mediaAn air pumpPlenty of live aquatic plantsHiding spots Heater A heater is essential to add to your cory catfish or any other fish aquarium. Adding a heater will help you provide the ideal water temperature for your fish. Also, the heater will keep the water temperature stable. Unstable water temperature will make your cory catfish come under stress. Cory catfish under stress for a long time will become prone to various diseases and parasites. Also read: Ideal Water Temperature For Cory Catfish. A filter Cory catfish are freshwater fish and prefer to live in clean water conditions. Adding a good filtration system with biofilter media will help keep the water clean and protected from harmful toxins like ammonia. Also, a filter will help in keeping the water oxygenated by creating a movement at the water surface An air pump Adding an air pump to your cory catfish tank will ensure enough oxygen in the water. An air pump will create a movement in the water's surface, helping exchange gases. The oxygen will enter the water, and carbon dioxide will get released with the help of agitation on the water's surface. Also read: Do Cory Catfish Need Oxygen? Live aquatic plants Adding plenty of live aquatic plants to your cory catfish tank will make a good hiding spot for them. Also, adding aquatic plants to your fish tank will help you keep the water clean. Plants will absorb the carbon dioxide and organic waste and keep the water well oxygenated by releasing oxygen. Hiding spots Cory catfish will require hiding spots in their tank to feel comfortable and secure. They prefer hiding when they are under stress or when they need to rest sometimes. So, creating hiding spots in your cory catfish tank will help them. You can create hiding spots in your cory catfish tank by adding decors like a cave, sunken ships, terracotta pots, and other items. Conclusion: The best substrate for your corydoras is sand. Corydoras are bottom dwellers and require a soft substrate to dig into and feed on the leftovers. Keeping your corydoras in a tank with a rough substrate like rocks and pebbles will make them harm themselves by trying to dig into the substrate. They will not be able to sift the hard and rough substrate and can lose their barbels sifting through the substrate. Good quality sand is the ideal option to use as a substrate for your corydoras tank. Also, it will help you mimic their natural habitat as they live in a river that has a sandy bottom in their natural habitat. Reference: Wikipedia, Britannica