Drinking Seltzer Water occasionally is okay for your stomach and can help with digestion and help with the stomach flu and other stomach aches.
However drinking too much Seltzer water could be bad for your health and stomach and it's been shown in studies that drinking too much Seltzer water could lead to osteoporosis because the seltzer water can leech calcium from your bones.
You need the calcium for your bones to stay healthy and strong.
Seltzer water can also sometimes lead to irritation of your stomach, possible stomach lining damage and even erode the natural protective enamel on your teeth.
I drink some seltzer water especially when I'm sick with the stomach flu or something else but I also drink regular water which is better for your health.