Sorry about the confusion- I meant another fixture because all the fixtures I have are being used for beardies and Leo's.

The bottom of the tank has linoleum to prevent bacterial growth and for easy cleaning. There are towel pieces in the hides for comfort /to give the little fella something to burrow in. In researching this over the past couple of months, it seems as though this is an acceptable practice. Can you offer any reason why loose substrate is needed? Thanks!