Ok so I was thinking about getting one more BP but I have no more rack room left if I buy a exo terra heat pad and stick it on the bottom of the tub is that safe and maybe covering the whole thing with foil tape ???? Also u have to use the little pegs right to put in the corner of the tub. I was hoping to do that and just put it on top of my RBI CB70.....good idea ...if you have any tubs set up like this can you post a pic ....Ps of course I will be using a thermostat !