how young are they and how long have they been in your tank? what other tankmates are there?
if they are adults who have been living in your tank a while, you will probably be ok...adults should not be fed as often as young frogs.
however, young frogs need to be fed quite frequently to get the nutrients they require, also if they are a recent addition to the tank then additional stress from being recently added to a new system could also contribute to illness.
they will most likely be OK (not great, but ok) but you may have a casualty depending on your particular tank stats, tankmates, and specs