Thank you so much for your reply. I didn't give any thought to my tap water, as I treat it 24 hours BEFORE it even goes into the tank. I will most definately check it after work, today. I use the 5-in-1 test strips. I will check into the liquid test, this weekend.
And, off topic, yes, I know all about my darling frogs. My husbands frog is quite large and I put in a tank divider and feed him a feeder guppy, twice a week. The rest of the time, he gets these floaty sticks that he really seems to like. And, yes, I know I'm taking a risk having him in there; but, I have no where else for him to go.
My 10 gal tank is home to 8 baby mollies, at the moment.