X. Melanogenys with Ventralis possible in a 2mx0,6mx0,5m.?

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Dear all,
I am in the possession of a nice tank with the following dimensions: 2mx0.6mx0.5m (lxw.h).

My current stock is:
- 12 C. Microlepidotus 'burundi'
- 1:3 L. Calliurus
- 1 L. brevispinnis
- 1:1 A. Compressiceps 'Kigoma'
- 3 X. Melanogenys (type unknown, m:f ratio unfortionatly unknown)

I was wondering if i could add a group of Ventralissen/ Nasuta's?