Most fish bowls range from 1/2 to 3 gallons in size

Fish Bowls: Desktop Aquariums & Fish Tanks | Petco
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I have one 1 gallon fish bowl and one 3 gallon fish bowl. I know that I can't keep any fish in them, but are there any attractive things I can do with them for not very much money. I would like to have plants in them also. Please give me a step by step set up of the fishbowls. Also, if you...
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Possibly the most frustrating thing about owning a fish bowl is the limited capacity for fish. In a filtered bowl, we recommend keeping only 1" of fish for every 1.5-2 gallons of water in the bowl—remember that the bowl is probably holding substantially less water than its total capacity since you are keeping the water level lowered to the widest part of the bowl—usually 1/3-1/2 of the bowl's capacity is air, not water. If you are not filtering your bowl, we recommend keeping your population at 1" of fish for every 3 gallons of water or lower. Remember that a fish's size is not determined by the environment it is kept in, but rather is controlled by genetics. The small fish you purchase for your bowl today may be a very large fish by the time it is mature. Keeping a fish in an environment that is too crowded or too small is cruel and can lead to a wide variety of health problems from reduced immune systems to crippling skeletal deformities or failure of internal systems. 3 and 1 gallon fish bowls
Photo provided by FlickrGloFish 3 Gallon Half Moon Aquarium Kit
Photo provided by Flickr3 gallon fish bowl | Compare Prices at Nextag
Photo provided by Flickr
Possibly the most frustrating thing about owning a fish bowl is thelimited for fish. In a bowl, we recommend keeping only 1"of fish for every 1.5-2 gallons of water in the bowl—rememberthat the bowl is probably holding substantially less water than itstotal capacity since you are keeping the water level lowered to thewidest part of the bowl—usually 1/3-1/2 of the bowl's capacity isair, not water. If you are not filtering your bowl, we recommendkeeping your population at 1" of fish for every 3 gallons of water orlower. Remember that a is notdetermined by the environment it is kept in, but rather is controlledby genetics. The small fish you purchase for your bowl today may be avery large fish by the time it is mature. Keeping a fish in anenvironment that is too crowded or too small is cruel and can lead toa wide variety of health problems from reduced immune systems tocrippling skeletal deformities or failure of internal systems.I have a 1.5 gallon bowl for my Betta. Here is a 10-watt heater that is excellent among Betta owners who keep their Betta fish in anywhere from 1 to 3 gallon bowls ((see below)). It’s called the “Marineland Shatterproof 10-Watt Heater”.