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Most Aquarist use this rule of thumb to put fish in an aquarium, 5 inches of adult fish for every gallon of water in the tank. The five inches only takes in the head and body. Do not use the tail in the measurement.

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Q: How many fish in a 20 gallon tank?
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How many gallons of water does a 20 gallon tank hold?

A 20 Gallon tank can hold up to 20 gallons of water.


How many gallons are in a fish tank 48 inches long and 18 inches wide and 20 inches high?

A bit less than 75 US gallons.


How many gallon in a 10 inches by 20 inches by 12 inches tank?

1 gallon = 231 cubic inches Volume of the tank is (10 x 20 x 12) = 2,400 cubic inches The tank has a capacity of (2,400 / 231) = 10.39 gallons (rounded), but we have no way of knowing how many gallons are "in it".


What is the standard gas tank capacity of a 1994 Chevy 1500 extended cab Z71?

Mine was 20 gallons. depends on the wheelbase the shorter will have a 23 gallon and the longer could have a 23 or 38 gallon tank


How many gallons of water does a twenty gallon fish tank hold?

a 20 GALLON tank does have a capacity of 20 gallons. Hope you have a great time with your spacious (to me at least) aquarium, i have a 5 gal. because that is all i can support and afford right now, for a 20 gal. i would recommend schooling tropical fish like tetras, danios, guppies, swordtails, scissortails, gouramis, ect." ok for the weight, if you have a 20 gallon tank with NO decorations or substrate in it ( sand/gravel it weighs 225 pounds! now mind you everything you put in your tank, takes up space. on average you will put 2 inches of substrate on the bottom of the tank, witch weighs about 22-25 lbs depending on the substrate your using. so there is 25lbs of water being displaced. now you have your heater, any air bubblers, decorations/plants and of course fish. everything you put in your tank takes up space. so realistically your looking at roughly 15 - 17 gallons ( US, not imperial as even in canada here the aquariums are sized by US gallon and not Imperial) of water in your tank. ( or roughly 64.26 liters based on 17 gallons..weighting in at 8.321 lb per pound is about 141 pounds.) So make darn sure whatever your putting the tank on can continuously hold 200+ pounds. if that falls off the stand you will know it. im sure the floor wouldn't appreciate the sudden weight dropped on it or the 75.6 litres of water now cascading around the room, down your heater vents or down your stairs! it holds 20 gallons of water

Related questions

i have 150 gallon Fish Tank, size 20"x66" to cover it. please reply me.?

In that 150 gallon fish tank try to put fish and maintain it


Do guppies need a heater in a 5 gallon fish tank?

If the temperature is around 20 degrees (Celcius) probably not. But for a five GALLON fish tank, probably.


How many gallons of water does a 20 gallon tank hold?

A 20 Gallon tank can hold up to 20 gallons of water.


How many ounces are in an average fish tank?

The average fish tank size is around 10-20 gallons, which is equivalent to 1280-2560 ounces.


How many goldfish can live in a one gallon tank?

20 gallons for one fish and 10 gallon for each addition goldfish. See the related link for further information.


What are some good long living fresh water fish for a 20 gallon tank?

Betta fish, guppies, tetras.


Can you breed your Fighting fish in a fish bowl?

No! It's not big enough you need a 10 gallon to 20 gallon tank or aquairuim for breeding and you need to be experienced for breeding. In short, no you can't try a 10 gallon tank or over that :) hope I helped


How many gallons is a quarter of a tank if you have a 20 gallon tank?

5 Gallons


What is compatible with a 5'' green terror in a 20 gallon tank?

Not a lot. A twenty gallon aquarium is too small for a 5" fish to begin with.


Can you keep a chain catshark in a 20 gallon tank?

No, these fish can grow past 1.5 ft in length


How many quarts dose the fish tank hold?

10 qts 1 gallon = 4 quarts 1 quart = 0.25 gallon


What size tank should you put your leopard gecko in10 gallon15 gallon long 20 gallon long?

either a 15 gallon tank or a 20 gallon tank