Springtails are delicious... I would think, my newts love them. If you're seriously worried about bugs you can try treating your plants with c02, just make sure none of your frogs are in them.
Buy some dry ice, place it in cups tilted at an angle on the top of your tank, and let it (c02) drop into your tank; the c02 will buildup and kill almost any organisms in the tank, and give your plants a boost. Just make sure your frogs aren't in it.