Not too easy, not too difficult, the key is probably to acclimitise the fish properly.
Take note that they are very good jumpers. Have your tank covered or provide some floating plants so that they feel comfortable in the tank.
Water condition from acidic to neutral is okay, tank mates should not be too large or too fast (possibility of being outcompete for food). Life span said to be 3 years.
Here is some information from a previous thread.
http://www.aquaticquotient.com/forum...ight=annulatus
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