White Clouds are temperate fish, not a good match with bettas who like tropical. Corydoras Catfish (most call them cories) or Otos are good. Many otos are wild caught and have a hard time getting used to generic food, but cories should be fine.
10 Gallon Tank:
~Countless Pond Snails~1 Espe's Rasbora~1 Harlequin Rasbora~
5 and 5.5 Gallon Tanks:
Avatar by Fenghuang
Many of my scaly friends from my original tank from 2011 have passed, except for two! I am in the process of re-doing my tank. :)