Cut each cucumber lengthwise into 4 spears. In a very large bowl, combine cucumbers, onion, dill, jalapenos and garlic. In a large saucepan, combine water, vinegar, salt and sugar. Bring to a boil; cook and stir just until salt and sugar are dissolved. Pour over cucumber mixture; cool., Cover tightly and refrigerate for at least 24 hours. Store in the refrigerator for up to 2 months.