I actually live in Canada so the water temp is probably around 75 I will confirm this tomorrow when I can find a thermometer. In winter I may need to find a way to heat the water. My issue is I live in a rural area that is limited in the bugs available.  Large dew worms are available until I can get my own worm farm going. I am planning to as besides the frogs I have 7 lizards that eat a variety of bugs.  I can only get large crickets and I have a place online but the crickets I have a hard time keeping them alive. I am starting super worms and mealworms for my other lizards and a worm farm for my horn dragon and the frogs now I guess.  I can get wax worms but locally they are kind of expensive.  The place I order from online occasionally has all sizes of crickets and wax worms which I also buy for my chameleon but they seem large compared to the size of my toads, although I could be wrong and like I said with crickets I have difficulty with large losses when I buy online because they come by the 100 and I lose quite a lot of them.