Yes provided your tank is not overstocked. The basic rules of keeping fish successfully are. ":- 1 inch of fish must have at least 1 gallon of water. :- Every tank must have a permanently running cycled filter. :- Every tank must have at least 50% of its water replaced every week."
I wouldn't prefer to.
Not if you don't put them together. Amphibians poison the water for fish.
Platys and black skirt tetras can live together. Harlequin rasboras, platys, and guppies are smaller than black skirt tetras and would do well together. However, the black skirts nip at fins, so if you have fancy tail guppies it is not recomended to put them in a smaller tank together.
Put one male together with three females. Provide hiding spaces for the fry.
Yes. Guppies normally get along well with each other. If there is a female in the group they will all try and win her affection if they are interested in her. They will still get on fine.
Yes - there is virtually no limit to how many female guppies can live together.
yes
If the goldfish is big enough and the guppies small enough, yes the guppies could well be eaten by the goldfish. Also, guppies should never be with guppies are guppies are tropical fish and goldfish are coldwater fish.
Adult guppies eat their own babies, and fish like tuna eat guppies.
no
yes, fish guppies,silver sharks and balloon mollies can be together.
yes my goldfish and guppies go fine together