After more than a month, the C. striolata in pot B seemed to be growing much better than that in pot A. See below, the first 2 photographs are the C. striolata in pot B taken one month apart, while the next 2 are that in pot A, also taken one month apart.
I therefore decided to add the same sand mixture into pot A too (see below) to see if the growth would be improved thereafter.
Similarly, there are a few species of cryptocoryne from Sarawak which are not growing well currently too. As these species of cryptocoryne were found in habitats with sandy base, I decided to add sand into the pots of cryptocorynes as well to see if this would improve their growth as well.
Firstly is C. auriculata 'Mador', the two photographs were taken one month apart. The C. auriculata was initially grown in a mixture of ADA Amazonia and Africana with peat granules and BE-1 organic fertiliser. The second photograph is the most current with sand already added in, showing the cryptocoryne not doing too well.
Secondly is C. cordata var. zonata 'Sungei Engkramut'. It was initially grown in a mixture of ADA Amazonia with peat granules and BE-1 organic fertiliser.