One frog per gallon is a good rule of thumb.
Dwarf Frogs can get along with other fish such as non aggressive betas, tetras, and other such peaceful fish, but in my opinion do best when in a species only environment.
Filtration is a good idea, but use a filter that doesn’t disturb the water too much.
Dwarf frogs are nocturnal and often shy. They need places to hide in the tank such as flower pots, artificial caves, or drift wood.
Dwarf Frogs come frog Africa (duh) so they like the water temp to be in the high 70s
Partial water changes should be done once a week or so
Contrary to what the pet store told you when you bought them they will not eat flake food or “frog bites”. It is best to use frozen or live food. I feed frozen blood worms, frozen daphnia, live tubifex worms, and chopped earthworm
Dwarf frogs are delicate and have sensitive skin so they should not be handled
Dwarf frogs, like all other frogs, will shed so don’t be too alarmed if you see your frog kicking it’s self. It is just shedding. Usually the frogs will eat their skin after they have shed it.
When buying your Dwarf frog check the front feet for webbing. If there is no webbing then it is a baby African Clawed Frog, which grow up to about 6 inches.
Sexing Dwarf frogs can be difficult. Males are usually slightly smaller and have a pinkish bump on their sides behind the front legs. Males will also call. Females are slightly larger and more “pear” shaped. They also have a larger “tail bump”.
During mating the male frog will grab the female in front of her back legs with his front legs. IF eggs are laid the pair will swim to the surface and flip upside down to deposit the eggs. The eggs are small and will stick to plants and the glass of the tank.
For info on tadpole care see the Sticky at the top of the Aquatic Frogs And Other Amphibians Forum.