Test strips are not very reliable. Check www.thatfishplace.com look under
Aquarium Pharmaceuticals for test kits. They have a salt test kit under
$10, plus all the rest I mentioned, under $5.

I got the thermometer yesterday. The temperature has been between 52 and 59.

If your fish are inside, I wouldn't be putting them outside till the water
temp is up in the 70's, not when you're concerned about Ich. ~ jan
~ jan