Learn Italian: L'acqua è abbastanza? - Is there enough water?

This sentence literally translates to "Is the water enough?". In English, it sounds more natural to say "Is there enough water?", but Italians often phrase it this way. You could also say C'è abbastanza acqua? to literally mean "Is there enough water?" — both are completely fine.

Does abbastanza (enough) change its ending to match the noun like molto or tanto do?

No, abbastanza is invariable. Unlike molto or tanto (which change to molti, molte, etc. to match gender and number), abbastanza always stays exactly the same, no matter what it is describing.

Could I put abbastanza before acqua?

Yes, but you would need to change the sentence structure. In this sentence, abbastanza comes after the verb è. If you wanted to put it before the noun, you would use the "is there" structure: C'è abbastanza acqua?

As a quick refresher, why is it l'acqua instead of la acqua?