Thanks lock_man. I retested the tap water and looked at it in more natural light last night, and it looks like 1 ppm from the tap. We went to the LFS and got a jug of their water for tanks, did approx 30% water change, and took some media from my established tank and put it in the five gallon. Tested this morning, no ammonia, no nitrites, very little nitrates and a 7.6 PH though. Will continue to monitor.
The guppies she's looking at are supposed to only get to 1.5 inches, but they might be including tails in their calculation.
Shrimp may work, what kind and how many?