Should I decouple my subs too?


Good day all. I am looking into some ISO Acoustics GAIA footers for my speakers. I was going to get them for all the speakers including the subs but I just got off the phone with the REL guy and he said NOT to put footers on the subs as they perform better coupled to the floor. Is there any one who has tried both ways as I thought the subs should get the footers too. Thanks for your input
ronboco
Thank you everyone for the advice. I really look forward to reading the daily posts. You all have taught me so much in the short amount of time I have been here. 
I have Gaia's under both of my subs (Tekton 4-10's) & they work wonderfully to decouple them from the floor. That stated, if I didn't already have the Gaia's, I would follow Noromance's advice above.  
I use a Sub Dude under my REL R305.and it made a huge difference in my set up.   Works well,  I put one under my Dad's sub and the bass is great and it doesnt rattle the rest of his house.   He kept playing movies too loud and it was keeping my mom up , so I went by one day with a Sub Dude.   He didnt even know I put it under,  i set his trims correctly and boomyness was gone.    Great product 
I tried my GAIA II footers from my GE Triton Refs on my SVS PB2000 pro sub and it made a big difference for the better. I put the footers back on my speakers and bought a set of SVS footers for the sub. It’s almost as good which is good enough for me especially when the SVS footers were $45.00 compared to $299.00 for the GAIA.

My house is 100 years old and my floors are wood suspended. As the sub is on the second floor of the house, everything on the first floor would vibrate before adding the footers, not so now.