Depends on the kind and size of the fish. You should also take in to consideration how large they will get at adulthood. A good rule of thumb to go by is 1 gallon of water for every 1 inch of fish. So for example: 3 2" fish should be in at least 6 gallons of water. To be safe I would put them in a 10 gallon aquarium.
Only 1. Usually a Betta is all that is kept in a 3 gallon tank
2 or 3
The rule of thumb is usually a gallon per fish, so six gallons would be good. If the fish are on the large side (like a goldfish), then a seven gallon tank would be ideal.
normal rule for fish in a tank is: For every 1 inch of fish there is 1 gallon of water
guppys are tropical fish. they require a heater, and 1 gallon is to small for a heater
id say 15 fish
A 1 gallon tank could have one betta fish, but you will need to be diligent about changing the water on a regular basis. The smallest tank that should be used, even for a betta, is a 2.5 gallon tank as it at least gives the fish swimming room.
length and width for a 55 gallon fish tank
A betta fish would be much more suited to a 1 gallon tank than a 'variety'. You shouldn't keep much more than one fish per gallon anyway.
Remove the sick fish..... the fish that has the ich should be put in a hospital tank then treated for ich, corals do not get ich, only the fish, so a ten gallon tank with a aerator would be ideal for a hospital tank....
This is simply funny if it really means a fish tank.About 1025.5 for a standard 100 gallon fish tank if the beers are 12 fl oz.Remember fish tank gallon sizes are measured by outside dimensions.
just leave 2 mails and 1 female guppy in the tank with no other fish in the tank at all times.-Shocker There should be 3 females to one male. If there are too many males, the females will get stressed out. I would recommend a larger fish tank than a half gallon. Maybe a 10 gallon tank. Remember, you are going to have some babies. Where will you put them?