Stocking Level Question For 29G

[Zolek]

29 Gallon / 109 Liter Tank

3 Burmese border loach (Botia Kubotai)
3 Upsidown catfish (Synodontis Nigreventris)
2 Cherry barb (Puntius titteya)
2 Ottocinculus (ottocinclus affinis)
1 bristlenose pleco
1 algae eating shrimp

Is this tank overstocked? Can I add a vampire shrimp?