Ok so you need a bottle of chlorine remover that is safe for fish and frogs. Which should be what ever is good for fish because those are aquatic frogs anyways. Something like this:
Amazon.com: Aquarium Pharmaceuticals 85J Stress Coat Fish and Tap Water Conditioner, 64 oz. Jug: Everything Else
That's what I use, it is usually in stores for cheaper. It helps the fish heal and de-chlorinates the water and makes it safe for them.
Then also you need a PH kit:
Amazon.com: API FRESHWATER pH TEST KIT: Pet Supplies
And then a bottle of PH up and PH down to change the PH:
Amazon.com: API pH UP 16 OZ: Pet Supplies
Amazon.com: Aquarium Pharmaceuticals pH Down 16oz: Pet Supplies
You can get way smaller bottles, I just found the first one that came up for example. And these last a long time.
With the PH test kits I have found the one I posted to be the best. And the brand API is the brand I have used for years.
There are tiny bottles of the PH up and down for a couple bucks.
It is also recommended to have a ammonia, nitrate and nitrite checker. But if you keep the tanks nice and clean then I find no need for them. I have always been able to keep those three in check all the time though
I would wait to put them in the new tank until you know the chlorine and metals are out. The chlorine should have evaporated out of the tiny tank already that they are already in.