Is the tank big enough?

Question

my sister has 2 male beta's in 2 separate vases, and in a different tank; 2 black mollies, and 7 other fish that i don't know the breed of but all seven are the same breed. The day after she bought them, she woke up to find she had 27 (she counted) black mollies and 5 more of the other fish. right now they are in a ten gallon tank, is this big enough for them?

I will be getting all of her fish temporarily, and i have a 20 gallon tank with 2 neon tetras, and a female beta, a 1 1/2 gallon vase with filter which has a male beta, a 2.5 gallon tank with sea monkeys, and a 5 gallon tank with a green spotted puffer fish (saltwater). Should i put my sister's fish with my fish? (My sister and i do not live together ) which tank should i put them in? will my fish be okay with them? do you know anything about black mollies?

Also what fish are the other ones? Most of them are white with black spots all over, they aren't guppies, they are a little bigger then the black mollies, and some are orange.

Answer 1

1 of all take the babies out of the tank that has the mom the mom will eat the babies and no the tank is NOT big enough! take the babies out asap or none will left!  

Answer 2

The rule of thumb is one gallon of water per one INCH of fish.  Do the math.  Also, don't mix the bettas or the puffer since they are aggressive; they need their own tanks.  Mollies come as "dalmatians" because they are spotted, as well as other colors.  

Answer 3

None of them should go together but the other 7 fish probably

or maybe a buttikoferi.Although they have black stripes not

black spots.All species will be aggressive with each other.

Only the ones that you have.And your sister.Just keep them the way they are.And no the tank is not big enough i prefer at least a 30

gallon tank.

Answer 4

...'Saltwater Puffer' gets one tank, due to his aggressive behavior

(otherwise the mollies will probably not mind the salt content of 1.005ppm)

....Sea Monkeys are also 'saltwater pets', and great fish food; leave sea monkeys in the 2.5 gal;

.....if you mix fish with sea monkeys the fish will eat the sea monkeys; although one puffer may not eat all of the sea monkeys....and, you might distract the puffer intersts with snails and crabs, it is risky (by the way, sea monkeys only live 1 to 2 years max, period)

Freshwater side:

....Bettas can mix with Mollies

....the female Betta can mix with Neon tetras and Mollies

....leave the males in their respect bowls; the female will compete for territory if housed with males, and males with males likely won't be perfectly happy; generally 20 gallons is not big enough for any 2 Bettas

Finally:

leave the male Bettas in their respective bowls

....the sea monkeys in their 2.5

....the GSP (salty) in his tank as is, per se, 5 gallon is too small- give him the 10 gal

....then keep the mollies, platys, moons and neons (plus female betta) in the remaining 20 gal and 5 gal as you choose to mix and match them

....add live plants, they live bearing Mollies, Platy and Moon groups' fry live longer if protected by plants.....but are still easy prey for about a month or six weeks, a fry net is advisable to allow fry to grow large enough to survive (live plants also absorb ammonia and nitrates as food, and also release CO2 that nourishes the bacteria in the water filter)

....Mollies are also white with black spots (Dalmation Mollies)

....Moons are orange and very similar to Mollies in shape