I wouldn't add water until the last minute, even though it's probably fine in the fridge.
Creatine accumulates in tissues and acts as a phosphate donator, which gives slightly increases endurance in power based movements. The key word is accumulates, so there isn't much instant effect. Taking it with carbs is a good idea. Slightly more interesting are it's effects on glucose storage, nutrient transport and myostatin inhibition, but that's getting a bit unnecessarily complicated.
All you need to know is that it can help the ingredients necessary for growth enter your muscles, and it's one of the only supplements shown to do anything at all for hypertrophy.
Creatine accumulates in tissues and acts as a phosphate donator, which gives slightly increases endurance in power based movements. The key word is accumulates, so there isn't much instant effect. Taking it with carbs is a good idea. Slightly more interesting are it's effects on glucose storage, nutrient transport and myostatin inhibition, but that's getting a bit unnecessarily complicated.
All you need to know is that it can help the ingredients necessary for growth enter your muscles, and it's one of the only supplements shown to do anything at all for hypertrophy.