Great advice, friendly people, and lots of frogs!
At many pet stores you can get flightless fruit fly kits. That may help until they can eat small crickets. It can help to get a vitamin and calcium supplement and dust the bugs if you don't already. You might want to put the frogs in a separate container for a while if the turtles keep eating their food. If you live in the US, it's probably illegal to return the Cuban to the wild since they're considered invasive, by the way. Generally mixing frog species is frowned on because different species have different levels of toxins in their skin and over time one can poison another. Personally I don't think that that would have any bad effects over the short term though. Finally, it's easier to see posts on the forum rather than those in the "blogs" section. You might get more answers posting that way. I hope your frogs and turtles do well.