Tropical Fish: Information on the Freshwater Catfish

No matter what size fish tank you have, a catfish or two can be an excellent addition. Catfish help keep the aquarium clean by scooping up uneaten food that would otherwise foul the tank. Many catfish will also eagerly eat algae off the sides of the tank, eliminating the need for hobbyists to scrape algae or use algae-destroying chemicals.

  1. Catfish Size

    • If your tank is on the small side, it is important to pay attention to the maximum size of any catfish you introduce. Many species of catfish can reach a foot or more in length, and that size can easily overwhelm a small aquarium. There are many species of catfish that remain small, so be sure to choose one of those smaller species unless your tank is 55 gallons or more. The staff at your local pet store can provide size information on the catfish you are considering.

    Catfish Need Heat

    • Keep in mind that catfish are tropical fish, so you will need a good heater for your tank. Also be sure that you have a good thermometer in place--the thermometer will alert you if there is a problem with the heater. Many new aquarium heaters are designed to fit inside the filter--this allows them to heat the water as it moves through the tank.

    Catfish Can Be Territorial

    • When choosing catfish for your aquarium, it is important to know that some species can be quite territorial--both with members of their own species and with other species of catfish. If you notice any territorial disputes among your catfish, try moving one of them to another tank.

    Catfish are Bottom Feeders

    • One of the most important jobs catfish perform is keeping the tank clean. When you feed your fish from the top, some of that food is bound to end up on the bottom of the tank. Without bottom feeders like catfish in the tank, that uneaten food can foul the tank and reduce water quality to dangerous levels.

    Supplemental Feeding

    • Many catfish owners assume that their fish will be able to gather enough uneaten food to meet their needs, but that is not necessarily the case. Supplementing your regular feedings with a few sinking food pellets is the best way to keep your catfish healthy and happy.