With knowlege and all the right equipment a small tank can easily be set up in an hour.
length and width for a 55 gallon fish tank
A Long life for a Betta is around 30 months.
you can put a betta in a 5 gallon tank
You can fit a 5 gallon fish tank on a school going desk.
Betta fish, guppies, tetras.
In that 150 gallon fish tank try to put fish and maintain it
How much gravel for 200 gallon tank
How long does it take for a oscar to get used to a new tank
Not for long. I advise you buy a 1 gallon tank until you can get a 5-10 gallon. Tadpoles need space. Wait, how big is it?
After filling the tank and conditioning the water I like to give it a week or two till I stock it. Really it depends on the size of the tank, a 30 gallon can cycle in three to four days were a 75 gallon tank should be left to cycle for about two weeks
You don't! What you do is get a 55 gallon tank because angelfish won't be happy in a 10 gallon tank, and then you take the betta out of the tank (it will fight with your other fish) and just get more mollies and put lots of hiding places in the tank so the babies will live.
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.