Will plecos eat guppy fry? or any other small fish? - Aquarium Forum
Oct 24, 2013 - The fact of your Pleco eating those small fish while they are still alive is almost impossible. They are just too small an fast for the Pleco.
Plecostomus are very popular because of their peaceful nature and ability to help keep the aquarium free of algae. The Sailfin Plecostomus is no exception and are a good community fish. They are not aggressive, and because they are primarily herbivorous, smaller fish are in no danger of being eaten. They do well with most larger fish with the exception of only the most highly aggressive species. But they are territorial towards their own species and can out compete other less gregarious plecos for available food. They also have been known to remove slime from laterally flattened fish like discus and angelfish while these fish are sleeping, and sometimes goldfish as well.
A minimum 100 gallon aquarium is recommended for the Leopard Plecostomus. Although when small they can be kept in a smaller aquarium for a short period of time, these are fast growing fish and will soon need to be moved. The aquarium should have plenty of wood for the fish to 'chew'. Not only do they rasp off algae, but the cellulose in wood may provide a necessary digestive aid. Wood decor also provides them places to hide in during the daylight hours. A well planted tank is great, but use hardy species as they can damage delicate plants as they move around grazing on algae growths. Also, as adults they may eat plants.
Smallest pleco? - AC Tropical Fish
Best Plecos & Algae Eaters for Small Freshwater Aquariums
Plecocostomus, also known as pleco or sucker fish, is the most common algae eater. There are many types of plecos with a wide range of sizes, colors, and markings. The most common is the Common Plecostomus. They are generally between 1-4” in size when sold, but will quickly outgrow the tank if it is under 50 gallons. They can easily and quickly grow up to two feet long. Pleco waste will cause the water parameters to swiftly decline, so it’s best to research the best pleco for the tank you have. Older Common Pleco will also become aggressive and will not be able to share a tank with smaller fish.I agree that these are excellent fish but they are very fast growers and a 10 gallon tank is not suitable for the common pleco. They can reach up to 18 inches in size. If you want to get one and you have a smaller tank just be prepared to get them into a larger tank when the time comes. Or try to get a bristlenose pleco which should only grow to about 5 inches or so. Also, although we've experienced it, we've heard reports of them becoming aggressive towards their tank mates. All that we have kept have always been very peaceful.There are alternatives to the Common Pleco, however, that can be kept in smaller tanks and live peacefully with community fish. The Bristlenose Pleco or the Clown pleco are both great options for community tanks. The Bristlenose grows to about 4” and the Clown pleco tops out around 3.5”. Both species require driftwood to be healthy, along with some hiding spots. They are nocturnal and greatly benefit from shady hiding areas. The Bristlenose is commonly available in brown and but can be found in gold and albino. Both plecos are great conversation starters. With their thick plates, they look like superheroes in custom armor.Like I already mentioned, Plecostomus catfish can grow up to 2 feet long. That’s 24 inches folks! Crazy large. These catfish will grow large in small habitats too. The size of their habitat does not stunt their growth.