Keeping conditions of african dwarf frogs (Hymenochirus)
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The most important in points:

• temperature 23-28 (30) °C
• pH value: 6,5 - 7,8
• total water hardness: 8-16 °d
• fine, rounded, lime-free, not too bright gravel
• many plants
• hiding place possibilities
• not too sharp lighting in the entire aquarium, i.e. create retreat possibilities in…
• … shady places in the aquarium
• only soft or minimum waterflow

The frogs live under water constantly (aquatil), however it can possibly occur that they come on the idea, to leave the aquarium. In nature the frogs move on drainage of the jungle pond or if they find no more food, over country into another water place.
In order to prevent a migration of the african dwarf frogs through the living room, you can cover the permeable places in the hood with stainless fly gauze, or cover the whole aquarium with it if you do not have a cover.

The water should flow only weakly, however the filter should not be under-sized (and/or the aquarium shouldn't be overcrowded). It must be able to reduce the elimination materials of the aquarium inhabitants fully biologically. With the size of the filter and the quantity of water in the aquarium the number of kept animals plays a crucial role. One can best be advised with a specialist dealer.

The frogs dig for food gladly. For this reason you may not lay stones on top of each other (or in such a way that the stones could be kill the frog if it digs under the stones), since these collapse otherwise quite easy and possibly burst the aquarium tank or bury an animal as a consequence.

Personally the risk of stone hiding places is generally too high to me. Therefore I offer only hiding place possibilities to the frogs in the form of small moor root or which worked with me also very well: Algae balls (Cladophora aegagrophila). If you put these to a group of at least 5 balls on the aquarium ground, then the animals can refuge in the gaps to rest themselves there, without any exposure to danger. The frogs accept the hiding places gladly, and a further advantage is the nitrate and phosphate reduction in the aquarium by this plant (a kind of green alga). It is very undemanding and durable and reduces the risk of other alga growing.

The plants should generally have the characteristic to be undemanding and (at least partly) a high pollutant reduction function. I've made the best experiences with the following plants:
 

You should take the installation of the aquarium absolutely attentively under the "magnifying glass", since also narrow gaps can represent a deadly traps for the frogs, since they are quite flat and maybe couldn't get out again of a gap which can cause the death of the animal. Because internal filters can mean a danger for this reason, you should use external filters if possible. These are available not only as pot external filters, but also for hanging up to the aquarium from the outside.
 

A typical pot external filter together with two external filters to hang up to the aquarium. The advantage of the pot filter is its large volume. The disadvantage of the two right filters is that one must cut a relatively large recess for it into the hood.

The photos are of the company EHEIM (r,l), and of the company HAGEN (m).

Suggestion for the installation of an ADF tank: