Nouns such as Geld, Wasser, Tomatenmark designate masses rather than countable items. The mass quantifiers etwas (some), viel (a lot), wenig (very little), ein wenig (not much, some) genug (enough) are used with mass nouns.

NOMINATIVE
 

Zu viel deutsches Geld bedeutet Inflation.

Too much German money means inflation.

DATIVE
 

Das machen wir mit ein wenig heißem Wasser.

We’ll do that with a little hot water.

ACCUSATIVE
 

Wir trinken etwas amerikanischen Whisky.

We’ll drink some American whiskey

Mass modifiers take no endings and do not affect the endings of attributive adjectives which may follow them.