What detergent is approved for use in the GE GSM2100 dishwasher?

Cascade® Automatic Dishwashing Detergent has been approved for use in all GE dishwashers. You should only use powder, tabs, or liquid detergents specifically made for dishwashers, as using the wrong detergent can cause sudsing. The amount of detergent needed depends on your water hardness — hard water requires more detergent, while soft water requires less to avoid permanent etching of glassware. (Pages 7, 13)