That is small better stick with a goldfish.
i have a half gallon bowl for my betta fish and he has plenty of room
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?
A half-gallon is 64 ounces...so, four drops.
length and width for a 55 gallon fish tank
Neons
you can put a betta in a 5 gallon tank
Which kind? Glass or acrylic?
You can fit a 5 gallon fish tank on a school going desk.
In that 150 gallon fish tank try to put fish and maintain it
How much gravel for 200 gallon tank
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.
Half gallon is miniature! it is cruel to keep a fish in a tank that size. I would definitely recommend getting a new, bigger tank. A 10 gallon would be ideal, fish options could be guppies (even though they breed like crazy) mollies, sword tails or platies.