There are other Tang. varieties that are smaller than that.
Here's a cookie cutter for you for a Lake Tang. tank:
Shell dweller community:
• 'Lamprologus' brevis - 1 pair
• 'Lamprologus' stappersii - trio
• Ancistrus temminckii "Bristlenose Pleco" - 1
OR
• 'Lamprologus' multifasciatus - 5
• Brachydanio rerio "Zebra Danio" - 3
• Ancistrus temminckii "Bristlenose Pleco" - 1
OR
• Alto. sp. "Compressiceps Shell"- 1 pair
• 'Lamprologus' caudopunctatus - 1 pair
• 'Lamprologus' similis - 1 trio
Tang mini community:
• Julidochromis regani - 1 pair
• Neolamprologus leleupi - 1 pair
• 'Lamprologus' occelatus - 1 trio
OR
• Telmatocrhomis vittatus - 1 pair
• Lepidiolamprologus hecqui - 1 pair
• Synodontis petricola - 3
OR
You could aim to have two pairs of fish. Your choice: (Works for 29gal also)
• Julidochromis regani - 1 pair
• Neolamprologus leleupi - 1 pair
• 'Lamprologus occelatus- 1 trio
-OR-
• Altolamprologus calvus or compressiceps pair
and one of:
• 'Lamprologus' (Shellies) brevis, multifasciatus, meleagris, ornatipinnis, ocellatus, speciosus, similis or Neolamprologus signatus
Normally one would get six young individuals of these fish, and remove the balance of the fish once they have a pair. If you wanted three pairs (groups) of fish.
If you wanted three pairs (groups) of fish:
• 'Lamprologus' (Shellies) brevis, multifasciatus, meleagris, ornatipinnis, ocellatus, speciosus, similis, Neolamprologus signatus, Altolamprologus sp. "Compressiceps Shell"
• Neolamprologus caudopunctatus (non-Shellies)
• Julidiochromis ornatus or transcriptus
• Telmatochromis bifrenatus, brichardi or vittatus
• Paracyprichromis nigripinnis,
• Xenotilapia flavipinnis