I'd say yes because they are incredibly light. They won't add weight and won't tear up the silicone seals on the inside of the tank. Then just run to a craft store and pick up a couple sheets of the cross stitch plastic canvas screen for a few cents each. Cut to fit the bottom of the tank and put on top of the hydro balls. Then add substrate.

Live plants need to be in pots sunk into the substrate. Scorps will dig them up otherwise. If you add a plant, wait until they have dug their burrows and put it away from the burrows and they shouldn't bother it.

http://lllreptile.com/store/catalog/...d-hydro-balls/

http://www.createforless.com/Darice+...utm_medium=cse