This is why the cricket water gutloads often work better for this application; all feeder insects will eat the water cubes. Crickets will actually consume the water bites as well. Might as well give them a water option that also gutloads them!
I am not sure how it will affect your beardie. Check the package to make sure it's non toxic, safe for pets, along those lines. If it doesn't specify, I would personally stop offering them. If I remember correctly, those water beads are designed for keeping flowers fresh instead of leaving them sitting in water, and they may not be designed to be safe for animal consumption.
-Jen