2. There is generally not chlorine in well water unless you add it to your well tank. The best way to know what's in your water is to have it tested at your local water facility or treatment plant nearest your home. Take a sealed cup full there. I would be more concerned with bacteria count than chlorine actually. You can use the ph/water test strips in any aquarium section of a pet store or even Walmart. It's easy to do, just dip the test strip in the water and read the color guide on the bottle. Another easy option is to use spring water. You can mist with distilled water, but do not soak your frog in it / do not use in his water bowl. As Mark has written, it cause electrolyte dilution and can lead to deficiencies which can quickly make them I'll.
3. Pacman frogs are tough little stinkers

. They will squoosh wimpy plants. Snake plants are great and can live right in the coco fiber substrate. Pothos grow easily too. Any amphibian/reptile safe plants that are sturdy and not sharp will work well. You can rinse all dirt and fertilizers off (a must) and put them back into small pots in the substrate if they are a gentler plant.
4. If you cannot find a good reptile show close to you there are some breeders here that have beautiful frogs and you can even choose which ones you want and there are a couple reputable online breeders as well, such as mikesphatphibs and joshsfrogs. Is there a certain type you're looking for?
