not many. Until recently i had a 15litre 'Baby Biorb' bowl with 2 goldfish in, however it did seem quite cramped even with just those 2 in there so I have upgraded to the 30litre version.
i guess however that it depends on what type of fish you are planning on keeping, i would say that my 15litre bowl would house maybe half a dozen minnows without problems, but anything larger will just feel cramped and won't be good the for the fish's health.
hope this helps to answer your question The rule of thumb for freshwater tanks is 1 inch of fish per gallon. That'd convert to 0.7 cm per liter if you have metric fish.
Using the simple calculation of 2.5cm of fish requires approximately 4ltrs of water, you would be OK putting 100 small fish of 2.5cm. (or 250cms of fish in total length) If you add lights, substrate, plants, a cycled filter and air then you can double this without problems. Please also consider what species you are introducing. A monotype aquarium is safest, but only of interest to a species specific fancier. Mixing species is risky, without even considering vegetarians vs. carnivores. Also, don't forget that a well-run environment will encourage growth, so that an initially stable tank will grow 'out of' itself quite quickly. Either subscribe to a good magazine or online site, or pick a quiet time at your local supplier and pick their brains.
There are many but for a beginner, most livebearers are OK as mixed community fish as are most Tetras, Barbs and Danios. Please remember the basic rule of 1" of fish requires1 gal of water. Take into consideration that the young fish you buy will probably grow larger. Also your tank can not be filled right to the brim and it will also probably have some kind of substrata. That will mean that your tank will only contain about 14 or 15 gals.
A 20-gallon tank can comfortably house around 4 to 6 molly fish. It is important to consider the size and behavior of the fish to ensure they have enough space to thrive.
In that 150 gallon fish tank try to put fish and maintain it
If the temperature is around 20 degrees (Celcius) probably not. But for a five GALLON fish tank, probably.
A 20 Gallon tank can hold up to 20 gallons of water.
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.
The average fish tank size is around 10-20 gallons, which is equivalent to 1280-2560 ounces.
A 20-gallon tank can comfortably house around 5 to 7 mollies.
20 gallons for one fish and 10 gallon for each addition goldfish. See the related link for further information.
Betta fish, guppies, tetras.
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
5 Gallons
The recommended number of shrimp that can comfortably live in a 20-gallon tank is around 20 to 30 shrimp.