Tropical fish, on the other hand, usually require a tank heater to thrive. For these fish, a tank heater is usually unnecessary. The ideal temperature for your tank depends on the type of fish you plan to keep in it.Ĭold water fish prefer typically prefer water temperatures around 65-70 degrees Fahrenheit. Unfortunately, there’s no “one size fits all” when it comes to aquarium temperature. What Temperature Does a 20 Gallon Fish Tank Need to Be? For this reason, you should only have one male and/or two to three female betta fish in your 20 gallon tank. Some don’t play well with others and prefer to be by themselves.īetta fish are a great example: even though they are only about 2 inches long full-grown, they are incredibly territorial and need a lot of space. While this rule of thumb works in many cases, you should also consider the temperament of the fish you hope to keep in your 20 gallon tank. They can grow to be 1.5 inches long, so you can safely keep up to 13 of them in your 20 gallon tank.If you add platies, which can grow to be up to 3 inches long, you should only keep 6 or 7 of them to make sure they have enough room. Let’s say you want to try adding tetra fish to your new tank. This makes sure each fish has enough room to be comfortable. You will need to provide a gallon of water for each inch of fish in your aquarium. How Many Fish Can Live in a 20 Gallon Tank? Because there is more water in the tank, it takes a larger change in environment for fish to be affected. Its larger size helps to reduce the effects of any changes in pH or water cleanliness. A 20 gallon tank is easier to clean than a 5 or 10 gallon tank because it’s easier to reach inside the tank to clean it thoroughly.Ī 20 gallon tank is also less temperamental than smaller tanks. While smaller tanks may seem easier to care for, the opposite is actually true. If you’re new to keeping fish, a 20 gallon aquarium will help keep your fish happy and healthy. It’s considered a medium-size aquarium, which makes it ideal for most fish owners. Is a 20 Gallon Aquarium a Good Size?Ī 20 gallon aquarium is a good size for many situations. Glass fish tanks are much more common than acrylic fish tanks, so you’ll probably be bringing home a glass fish tank. An acrylic fish tank of the same size will weigh slightly less. When it’s empty, a 20 gallon glass fish tank weighs 25 pounds. Thankfully, we’ve completed this confusing mathematical equation for you so that you don’t have to. The weight of an aquarium depends on the thickness of its walls, its dimensions, and the weight of the glass per millimeter. How Much Does a 20 Gallon Fish Tank Weigh Empty? Keep reading to learn how to create the right environment for fish in your new tank. Any gravel, decorations, and filters will also increase the weight. ![]() When it’s empty, a 20 gallon glass fish tank has a weight of 25 pounds. Before bringing your new fish tank home, it’s important to know how heavy it is. Have you ever tried to move a fish tank to a new spot, only to realize how heavy it is? While they may not look like it, even small tanks are incredibly heavy.
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