What type of bedding is it though? What is it made out of? It'll say on the package.
Spring water is good for the frogs, but you can also get a bottle of water purifier like what is used for fish and treat your tap water with it and use that (if you use city water; if you have well water you'd be safer sticking with the gallons of spring water). It's like 20 dollars for a big bottle of it, but it can treat hundreds of gallons of water with it, so you come out cheaper in the long run.