Schaller ́s Croaking GouramiThe rare Schaller s Croaking Gourami, Trichopsis schalleri, is most suited for small aquariums that are calm such as a planted nano tank and should not be mixed in busy or crowded community aquariums. It can tolerate a normal range of pH levels (5 7. 5) which makes it less demanding and moderately easier to keep when compared to other Licorice Gouramis. The Croaking Gourami can be maintained like other genus in this species under fairly dim lighting