As has already been mentioned, the frogs need to be kept 80-82 degrees daytime and 75-80 degrees at night. As for water, only spring water or water that has been treated with something like Seachem Prime or a similar water conditioner (like you use for fish). Goldfish are a poor food source. In addition to carrying parasites and such that can be passed to your frogs, they have thiaminase in them which can cause serious neurological problems and even death. You need to switch to either crickets, dubia roaches, or nightcrawlers ASAP.
You can put 5-6 drops of honey in lukewarm TREATED water no deeper than the frog's chin and soak him in it for a bit to reduce the bloating.