I would go one further and get distilled water, or a RO machine, since you are already buying water. Nothing better than knowing EXACTLY what is in your water because YOU put it there. My tap water was not able to grow plants hydroponically (makes me kinda question drinking it :wtf. Also knowing your pH is vital, and you cannot successfully diagnose a problem if you don't know the pH. Also its better to show the entire plant in your photos, rather than just individual leaves.